20718540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:172

約数の個数: 144

約数和(自身を含む): 67092480

約数和(自身を除く): 46373940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 31, 36, 45, 47, 60, 62, 79, 90, 93, 94, 124, 141, 155, 158, 180, 186, 188, 235, 237, 279, 282, 310, 316, 372, 395, 423, 465, 470, 474, 558, 564, 620, 705, 711, 790, 846, 930, 940, 948, 1116, 1185, 1395, 1410, 1422, 1457, 1580, 1692, 1860, 2115, 2370, 2449, 2790, 2820, 2844, 2914, 3555, 3713, 4230, 4371, 4740, 4898, 5580, 5828, 7110, 7285, 7347, 7426, 8460, 8742, 9796, 11139, 12245, 13113, 14220, 14570, 14694, 14852, 17484, 18565, 21855, 22041, 22278, 24490, 26226, 29140, 29388, 33417, 36735, 37130, 43710, 44082, 44556, 48980, 52452, 55695, 65565, 66834, 73470, 74260, 87420, 88164, 110205, 111390, 115103, 131130, 133668, 146940, 167085, 220410, 222780, 230206, 262260, 334170, 345309, 440820, 460412, 575515, 668340, 690618, 1035927, 1151030, 1381236, 1726545, 2071854, 2302060, 3453090, 4143708, 5179635, 6906180, 10359270, 20718540]

約数ペア:

[(1, 20718540), (2, 10359270), (3, 6906180), (4, 5179635), (5, 4143708), (6, 3453090), (9, 2302060), (10, 2071854), (12, 1726545), (15, 1381236), (18, 1151030), (20, 1035927), (30, 690618), (31, 668340), (36, 575515), (45, 460412), (47, 440820), (60, 345309), (62, 334170), (79, 262260), (90, 230206), (93, 222780), (94, 220410), (124, 167085), (141, 146940), (155, 133668), (158, 131130), (180, 115103), (186, 111390), (188, 110205), (235, 88164), (237, 87420), (279, 74260), (282, 73470), (310, 66834), (316, 65565), (372, 55695), (395, 52452), (423, 48980), (465, 44556), (470, 44082), (474, 43710), (558, 37130), (564, 36735), (620, 33417), (705, 29388), (711, 29140), (790, 26226), (846, 24490), (930, 22278), (940, 22041), (948, 21855), (1116, 18565), (1185, 17484), (1395, 14852), (1410, 14694), (1422, 14570), (1457, 14220), (1580, 13113), (1692, 12245), (1860, 11139), (2115, 9796), (2370, 8742), (2449, 8460), (2790, 7426), (2820, 7347), (2844, 7285), (2914, 7110), (3555, 5828), (3713, 5580), (4230, 4898), (4371, 4740)]