31978980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{521}}^1$

素因数の和:578

約数の個数: 144

約数和(自身を含む): 109444608

約数和(自身を除く): 77465628

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, 124, 132, 155, 165, 180, 186, 198, 220, 279, 310, 330, 341, 372, 396, 465, 495, 521, 558, 620, 660, 682, 930, 990, 1023, 1042, 1116, 1364, 1395, 1563, 1705, 1860, 1980, 2046, 2084, 2605, 2790, 3069, 3126, 3410, 4092, 4689, 5115, 5210, 5580, 5731, 6138, 6252, 6820, 7815, 9378, 10230, 10420, 11462, 12276, 15345, 15630, 16151, 17193, 18756, 20460, 22924, 23445, 28655, 30690, 31260, 32302, 34386, 46890, 48453, 51579, 57310, 61380, 64604, 68772, 80755, 85965, 93780, 96906, 103158, 114620, 145359, 161510, 171930, 177661, 193812, 206316, 242265, 257895, 290718, 323020, 343860, 355322, 484530, 515790, 532983, 581436, 710644, 726795, 888305, 969060, 1031580, 1065966, 1453590, 1598949, 1776610, 2131932, 2664915, 2907180, 3197898, 3553220, 5329830, 6395796, 7994745, 10659660, 15989490, 31978980]

約数ペア:

[(1, 31978980), (2, 15989490), (3, 10659660), (4, 7994745), (5, 6395796), (6, 5329830), (9, 3553220), (10, 3197898), (11, 2907180), (12, 2664915), (15, 2131932), (18, 1776610), (20, 1598949), (22, 1453590), (30, 1065966), (31, 1031580), (33, 969060), (36, 888305), (44, 726795), (45, 710644), (55, 581436), (60, 532983), (62, 515790), (66, 484530), (90, 355322), (93, 343860), (99, 323020), (110, 290718), (124, 257895), (132, 242265), (155, 206316), (165, 193812), (180, 177661), (186, 171930), (198, 161510), (220, 145359), (279, 114620), (310, 103158), (330, 96906), (341, 93780), (372, 85965), (396, 80755), (465, 68772), (495, 64604), (521, 61380), (558, 57310), (620, 51579), (660, 48453), (682, 46890), (930, 34386), (990, 32302), (1023, 31260), (1042, 30690), (1116, 28655), (1364, 23445), (1395, 22924), (1563, 20460), (1705, 18756), (1860, 17193), (1980, 16151), (2046, 15630), (2084, 15345), (2605, 12276), (2790, 11462), (3069, 10420), (3126, 10230), (3410, 9378), (4092, 7815), (4689, 6820), (5115, 6252), (5210, 6138), (5580, 5731)]