21492120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{599}}^1$

素因数の和:649

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 51083880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 23, 24, 26, 30, 39, 40, 46, 52, 60, 65, 69, 78, 92, 104, 115, 120, 130, 138, 156, 184, 195, 230, 260, 276, 299, 312, 345, 390, 460, 520, 552, 598, 599, 690, 780, 897, 920, 1196, 1198, 1380, 1495, 1560, 1794, 1797, 2392, 2396, 2760, 2990, 2995, 3588, 3594, 4485, 4792, 5980, 5990, 7176, 7188, 7787, 8970, 8985, 11960, 11980, 13777, 14376, 15574, 17940, 17970, 23361, 23960, 27554, 31148, 35880, 35940, 38935, 41331, 46722, 55108, 62296, 68885, 71880, 77870, 82662, 93444, 110216, 116805, 137770, 155740, 165324, 179101, 186888, 206655, 233610, 275540, 311480, 330648, 358202, 413310, 467220, 537303, 551080, 716404, 826620, 895505, 934440, 1074606, 1432808, 1653240, 1791010, 2149212, 2686515, 3582020, 4298424, 5373030, 7164040, 10746060, 21492120]

約数ペア:

[(1, 21492120), (2, 10746060), (3, 7164040), (4, 5373030), (5, 4298424), (6, 3582020), (8, 2686515), (10, 2149212), (12, 1791010), (13, 1653240), (15, 1432808), (20, 1074606), (23, 934440), (24, 895505), (26, 826620), (30, 716404), (39, 551080), (40, 537303), (46, 467220), (52, 413310), (60, 358202), (65, 330648), (69, 311480), (78, 275540), (92, 233610), (104, 206655), (115, 186888), (120, 179101), (130, 165324), (138, 155740), (156, 137770), (184, 116805), (195, 110216), (230, 93444), (260, 82662), (276, 77870), (299, 71880), (312, 68885), (345, 62296), (390, 55108), (460, 46722), (520, 41331), (552, 38935), (598, 35940), (599, 35880), (690, 31148), (780, 27554), (897, 23960), (920, 23361), (1196, 17970), (1198, 17940), (1380, 15574), (1495, 14376), (1560, 13777), (1794, 11980), (1797, 11960), (2392, 8985), (2396, 8970), (2760, 7787), (2990, 7188), (2995, 7176), (3588, 5990), (3594, 5980), (4485, 4792)]