128123840

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1621}}^1$

素因数の和:1670

約数の個数: 112

約数和(自身を含む): 346069920

約数和(自身を除く): 217946080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 320, 380, 416, 494, 520, 608, 760, 832, 988, 1040, 1216, 1235, 1520, 1621, 1976, 2080, 2470, 3040, 3242, 3952, 4160, 4940, 6080, 6484, 7904, 8105, 9880, 12968, 15808, 16210, 19760, 21073, 25936, 30799, 32420, 39520, 42146, 51872, 61598, 64840, 79040, 84292, 103744, 105365, 123196, 129680, 153995, 168584, 210730, 246392, 259360, 307990, 337168, 400387, 421460, 492784, 518720, 615980, 674336, 800774, 842920, 985568, 1231960, 1348672, 1601548, 1685840, 1971136, 2001935, 2463920, 3203096, 3371680, 4003870, 4927840, 6406192, 6743360, 8007740, 9855680, 12812384, 16015480, 25624768, 32030960, 64061920, 128123840]

約数ペア:

[(1, 128123840), (2, 64061920), (4, 32030960), (5, 25624768), (8, 16015480), (10, 12812384), (13, 9855680), (16, 8007740), (19, 6743360), (20, 6406192), (26, 4927840), (32, 4003870), (38, 3371680), (40, 3203096), (52, 2463920), (64, 2001935), (65, 1971136), (76, 1685840), (80, 1601548), (95, 1348672), (104, 1231960), (130, 985568), (152, 842920), (160, 800774), (190, 674336), (208, 615980), (247, 518720), (260, 492784), (304, 421460), (320, 400387), (380, 337168), (416, 307990), (494, 259360), (520, 246392), (608, 210730), (760, 168584), (832, 153995), (988, 129680), (1040, 123196), (1216, 105365), (1235, 103744), (1520, 84292), (1621, 79040), (1976, 64840), (2080, 61598), (2470, 51872), (3040, 42146), (3242, 39520), (3952, 32420), (4160, 30799), (4940, 25936), (6080, 21073), (6484, 19760), (7904, 16210), (8105, 15808), (9880, 12968)]