20784528

素因数分解:

$2^4\times 3^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:181

約数の個数: 120

約数和(自身を含む): 61746048

約数和(自身を除く): 40961520

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 37, 47, 48, 72, 74, 83, 94, 111, 141, 144, 148, 166, 188, 222, 249, 282, 296, 332, 333, 376, 423, 444, 498, 564, 592, 664, 666, 747, 752, 846, 888, 996, 1128, 1328, 1332, 1494, 1692, 1739, 1776, 1992, 2256, 2664, 2988, 3071, 3384, 3478, 3901, 3984, 5217, 5328, 5976, 6142, 6768, 6956, 7802, 9213, 10434, 11703, 11952, 12284, 13912, 15604, 15651, 18426, 20868, 23406, 24568, 27639, 27824, 31208, 31302, 35109, 36852, 41736, 46812, 49136, 55278, 62416, 62604, 70218, 73704, 83472, 93624, 110556, 125208, 140436, 144337, 147408, 187248, 221112, 250416, 280872, 288674, 433011, 442224, 561744, 577348, 866022, 1154696, 1299033, 1732044, 2309392, 2598066, 3464088, 5196132, 6928176, 10392264, 20784528]

約数ペア:

[(1, 20784528), (2, 10392264), (3, 6928176), (4, 5196132), (6, 3464088), (8, 2598066), (9, 2309392), (12, 1732044), (16, 1299033), (18, 1154696), (24, 866022), (36, 577348), (37, 561744), (47, 442224), (48, 433011), (72, 288674), (74, 280872), (83, 250416), (94, 221112), (111, 187248), (141, 147408), (144, 144337), (148, 140436), (166, 125208), (188, 110556), (222, 93624), (249, 83472), (282, 73704), (296, 70218), (332, 62604), (333, 62416), (376, 55278), (423, 49136), (444, 46812), (498, 41736), (564, 36852), (592, 35109), (664, 31302), (666, 31208), (747, 27824), (752, 27639), (846, 24568), (888, 23406), (996, 20868), (1128, 18426), (1328, 15651), (1332, 15604), (1494, 13912), (1692, 12284), (1739, 11952), (1776, 11703), (1992, 10434), (2256, 9213), (2664, 7802), (2988, 6956), (3071, 6768), (3384, 6142), (3478, 5976), (3901, 5328), (3984, 5217)]