81696780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^4\times {\mathrm{31}}^1$

素因数の和:90

約数の個数: 180

約数和(自身を含む): 281386560

約数和(自身を除く): 199689780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 31, 33, 36, 44, 45, 55, 60, 62, 66, 90, 93, 99, 110, 121, 124, 132, 155, 165, 180, 186, 198, 220, 242, 279, 310, 330, 341, 363, 372, 396, 465, 484, 495, 558, 605, 620, 660, 682, 726, 930, 990, 1023, 1089, 1116, 1210, 1331, 1364, 1395, 1452, 1705, 1815, 1860, 1980, 2046, 2178, 2420, 2662, 2790, 3069, 3410, 3630, 3751, 3993, 4092, 4356, 5115, 5324, 5445, 5580, 6138, 6655, 6820, 7260, 7502, 7986, 10230, 10890, 11253, 11979, 12276, 13310, 14641, 15004, 15345, 15972, 18755, 19965, 20460, 21780, 22506, 23958, 26620, 29282, 30690, 33759, 37510, 39930, 41261, 43923, 45012, 47916, 56265, 58564, 59895, 61380, 67518, 73205, 75020, 79860, 82522, 87846, 112530, 119790, 123783, 131769, 135036, 146410, 165044, 168795, 175692, 206305, 219615, 225060, 239580, 247566, 263538, 292820, 337590, 371349, 412610, 439230, 453871, 495132, 527076, 618915, 658845, 675180, 742698, 825220, 878460, 907742, 1237830, 1317690, 1361613, 1485396, 1815484, 1856745, 2269355, 2475660, 2635380, 2723226, 3713490, 4084839, 4538710, 5446452, 6808065, 7426980, 8169678, 9077420, 13616130, 16339356, 20424195, 27232260, 40848390, 81696780]

約数ペア:

[(1, 81696780), (2, 40848390), (3, 27232260), (4, 20424195), (5, 16339356), (6, 13616130), (9, 9077420), (10, 8169678), (11, 7426980), (12, 6808065), (15, 5446452), (18, 4538710), (20, 4084839), (22, 3713490), (30, 2723226), (31, 2635380), (33, 2475660), (36, 2269355), (44, 1856745), (45, 1815484), (55, 1485396), (60, 1361613), (62, 1317690), (66, 1237830), (90, 907742), (93, 878460), (99, 825220), (110, 742698), (121, 675180), (124, 658845), (132, 618915), (155, 527076), (165, 495132), (180, 453871), (186, 439230), (198, 412610), (220, 371349), (242, 337590), (279, 292820), (310, 263538), (330, 247566), (341, 239580), (363, 225060), (372, 219615), (396, 206305), (465, 175692), (484, 168795), (495, 165044), (558, 146410), (605, 135036), (620, 131769), (660, 123783), (682, 119790), (726, 112530), (930, 87846), (990, 82522), (1023, 79860), (1089, 75020), (1116, 73205), (1210, 67518), (1331, 61380), (1364, 59895), (1395, 58564), (1452, 56265), (1705, 47916), (1815, 45012), (1860, 43923), (1980, 41261), (2046, 39930), (2178, 37510), (2420, 33759), (2662, 30690), (2790, 29282), (3069, 26620), (3410, 23958), (3630, 22506), (3751, 21780), (3993, 20460), (4092, 19965), (4356, 18755), (5115, 15972), (5324, 15345), (5445, 15004), (5580, 14641), (6138, 13310), (6655, 12276), (6820, 11979), (7260, 11253), (7502, 10890), (7986, 10230)]