177777808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{349}}^1$

素因数の和:480

約数の個数: 80

約数和(自身を含む): 388864000

約数和(自身を除く): 211086192

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 79, 104, 124, 158, 208, 248, 316, 349, 403, 496, 632, 698, 806, 1027, 1264, 1396, 1612, 2054, 2449, 2792, 3224, 4108, 4537, 4898, 5584, 6448, 8216, 9074, 9796, 10819, 16432, 18148, 19592, 21638, 27571, 31837, 36296, 39184, 43276, 55142, 63674, 72592, 86552, 110284, 127348, 140647, 173104, 220568, 254696, 281294, 358423, 441136, 509392, 562588, 716846, 854701, 1125176, 1433692, 1709402, 2250352, 2867384, 3418804, 5734768, 6837608, 11111113, 13675216, 22222226, 44444452, 88888904, 177777808]

約数ペア:

[(1, 177777808), (2, 88888904), (4, 44444452), (8, 22222226), (13, 13675216), (16, 11111113), (26, 6837608), (31, 5734768), (52, 3418804), (62, 2867384), (79, 2250352), (104, 1709402), (124, 1433692), (158, 1125176), (208, 854701), (248, 716846), (316, 562588), (349, 509392), (403, 441136), (496, 358423), (632, 281294), (698, 254696), (806, 220568), (1027, 173104), (1264, 140647), (1396, 127348), (1612, 110284), (2054, 86552), (2449, 72592), (2792, 63674), (3224, 55142), (4108, 43276), (4537, 39184), (4898, 36296), (5584, 31837), (6448, 27571), (8216, 21638), (9074, 19592), (9796, 18148), (10819, 16432)]