20798440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:131

約数の個数: 128

約数和(自身を含む): 55157760

約数和(自身を除く): 34359320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 37, 40, 46, 47, 52, 65, 74, 92, 94, 104, 115, 130, 148, 184, 185, 188, 230, 235, 260, 296, 299, 370, 376, 460, 470, 481, 520, 598, 611, 740, 851, 920, 940, 962, 1081, 1196, 1222, 1480, 1495, 1702, 1739, 1880, 1924, 2162, 2392, 2405, 2444, 2990, 3055, 3404, 3478, 3848, 4255, 4324, 4810, 4888, 5405, 5980, 6110, 6808, 6956, 8510, 8648, 8695, 9620, 10810, 11063, 11960, 12220, 13912, 14053, 17020, 17390, 19240, 21620, 22126, 22607, 24440, 28106, 34040, 34780, 39997, 43240, 44252, 45214, 55315, 56212, 69560, 70265, 79994, 88504, 90428, 110630, 112424, 113035, 140530, 159988, 180856, 199985, 221260, 226070, 281060, 319976, 399970, 442520, 452140, 519961, 562120, 799940, 904280, 1039922, 1599880, 2079844, 2599805, 4159688, 5199610, 10399220, 20798440]

約数ペア:

[(1, 20798440), (2, 10399220), (4, 5199610), (5, 4159688), (8, 2599805), (10, 2079844), (13, 1599880), (20, 1039922), (23, 904280), (26, 799940), (37, 562120), (40, 519961), (46, 452140), (47, 442520), (52, 399970), (65, 319976), (74, 281060), (92, 226070), (94, 221260), (104, 199985), (115, 180856), (130, 159988), (148, 140530), (184, 113035), (185, 112424), (188, 110630), (230, 90428), (235, 88504), (260, 79994), (296, 70265), (299, 69560), (370, 56212), (376, 55315), (460, 45214), (470, 44252), (481, 43240), (520, 39997), (598, 34780), (611, 34040), (740, 28106), (851, 24440), (920, 22607), (940, 22126), (962, 21620), (1081, 19240), (1196, 17390), (1222, 17020), (1480, 14053), (1495, 13912), (1702, 12220), (1739, 11960), (1880, 11063), (1924, 10810), (2162, 9620), (2392, 8695), (2405, 8648), (2444, 8510), (2990, 6956), (3055, 6808), (3404, 6110), (3478, 5980), (3848, 5405), (4255, 4888), (4324, 4810)]