20115680

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{509}}^1$

素因数の和:556

約数の個数: 96

約数和(自身を含む): 53978400

約数和(自身を除く): 33862720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 380, 416, 494, 509, 520, 608, 760, 988, 1018, 1040, 1235, 1520, 1976, 2036, 2080, 2470, 2545, 3040, 3952, 4072, 4940, 5090, 6617, 7904, 8144, 9671, 9880, 10180, 13234, 16288, 19342, 19760, 20360, 26468, 33085, 38684, 39520, 40720, 48355, 52936, 66170, 77368, 81440, 96710, 105872, 125723, 132340, 154736, 193420, 211744, 251446, 264680, 309472, 386840, 502892, 529360, 628615, 773680, 1005784, 1058720, 1257230, 1547360, 2011568, 2514460, 4023136, 5028920, 10057840, 20115680]

約数ペア:

[(1, 20115680), (2, 10057840), (4, 5028920), (5, 4023136), (8, 2514460), (10, 2011568), (13, 1547360), (16, 1257230), (19, 1058720), (20, 1005784), (26, 773680), (32, 628615), (38, 529360), (40, 502892), (52, 386840), (65, 309472), (76, 264680), (80, 251446), (95, 211744), (104, 193420), (130, 154736), (152, 132340), (160, 125723), (190, 105872), (208, 96710), (247, 81440), (260, 77368), (304, 66170), (380, 52936), (416, 48355), (494, 40720), (509, 39520), (520, 38684), (608, 33085), (760, 26468), (988, 20360), (1018, 19760), (1040, 19342), (1235, 16288), (1520, 13234), (1976, 10180), (2036, 9880), (2080, 9671), (2470, 8144), (2545, 7904), (3040, 6617), (3952, 5090), (4072, 4940)]