20891880

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{443}}^1$

素因数の和:591

約数の個数: 96

約数和(自身を含む): 68571360

約数和(自身を除く): 47679480

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 131, 180, 262, 360, 393, 443, 524, 655, 786, 886, 1048, 1179, 1310, 1329, 1572, 1772, 1965, 2215, 2358, 2620, 2658, 3144, 3544, 3930, 3987, 4430, 4716, 5240, 5316, 5895, 6645, 7860, 7974, 8860, 9432, 10632, 11790, 13290, 15720, 15948, 17720, 19935, 23580, 26580, 31896, 39870, 47160, 53160, 58033, 79740, 116066, 159480, 174099, 232132, 290165, 348198, 464264, 522297, 580330, 696396, 870495, 1044594, 1160660, 1392792, 1740990, 2089188, 2321320, 2611485, 3481980, 4178376, 5222970, 6963960, 10445940, 20891880]

約数ペア:

[(1, 20891880), (2, 10445940), (3, 6963960), (4, 5222970), (5, 4178376), (6, 3481980), (8, 2611485), (9, 2321320), (10, 2089188), (12, 1740990), (15, 1392792), (18, 1160660), (20, 1044594), (24, 870495), (30, 696396), (36, 580330), (40, 522297), (45, 464264), (60, 348198), (72, 290165), (90, 232132), (120, 174099), (131, 159480), (180, 116066), (262, 79740), (360, 58033), (393, 53160), (443, 47160), (524, 39870), (655, 31896), (786, 26580), (886, 23580), (1048, 19935), (1179, 17720), (1310, 15948), (1329, 15720), (1572, 13290), (1772, 11790), (1965, 10632), (2215, 9432), (2358, 8860), (2620, 7974), (2658, 7860), (3144, 6645), (3544, 5895), (3930, 5316), (3987, 5240), (4430, 4716)]