21276840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{593}}^1$

素因数の和:643

約数の個数: 128

約数和(自身を含む): 71850240

約数和(自身を除く): 50573400

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, 593, 598, 690, 780, 897, 920, 1186, 1196, 1380, 1495, 1560, 1779, 1794, 2372, 2392, 2760, 2965, 2990, 3558, 3588, 4485, 4744, 5930, 5980, 7116, 7176, 7709, 8895, 8970, 11860, 11960, 13639, 14232, 15418, 17790, 17940, 23127, 23720, 27278, 30836, 35580, 35880, 38545, 40917, 46254, 54556, 61672, 68195, 71160, 77090, 81834, 92508, 109112, 115635, 136390, 154180, 163668, 177307, 185016, 204585, 231270, 272780, 308360, 327336, 354614, 409170, 462540, 531921, 545560, 709228, 818340, 886535, 925080, 1063842, 1418456, 1636680, 1773070, 2127684, 2659605, 3546140, 4255368, 5319210, 7092280, 10638420, 21276840]

約数ペア:

[(1, 21276840), (2, 10638420), (3, 7092280), (4, 5319210), (5, 4255368), (6, 3546140), (8, 2659605), (10, 2127684), (12, 1773070), (13, 1636680), (15, 1418456), (20, 1063842), (23, 925080), (24, 886535), (26, 818340), (30, 709228), (39, 545560), (40, 531921), (46, 462540), (52, 409170), (60, 354614), (65, 327336), (69, 308360), (78, 272780), (92, 231270), (104, 204585), (115, 185016), (120, 177307), (130, 163668), (138, 154180), (156, 136390), (184, 115635), (195, 109112), (230, 92508), (260, 81834), (276, 77090), (299, 71160), (312, 68195), (345, 61672), (390, 54556), (460, 46254), (520, 40917), (552, 38545), (593, 35880), (598, 35580), (690, 30836), (780, 27278), (897, 23720), (920, 23127), (1186, 17940), (1196, 17790), (1380, 15418), (1495, 14232), (1560, 13639), (1779, 11960), (1794, 11860), (2372, 8970), (2392, 8895), (2760, 7709), (2965, 7176), (2990, 7116), (3558, 5980), (3588, 5930), (4485, 4744)]