21478275

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1049}}^1$

素因数の和:1085

約数の個数: 72

約数和(自身を含む): 47392800

約数和(自身を除く): 25914525

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 25, 35, 39, 45, 63, 65, 75, 91, 105, 117, 175, 195, 225, 273, 315, 325, 455, 525, 585, 819, 975, 1049, 1365, 1575, 2275, 2925, 3147, 4095, 5245, 6825, 7343, 9441, 13637, 15735, 20475, 22029, 26225, 36715, 40911, 47205, 66087, 68185, 78675, 95459, 110145, 122733, 183575, 204555, 236025, 286377, 330435, 340925, 477295, 550725, 613665, 859131, 1022775, 1431885, 1652175, 2386475, 3068325, 4295655, 7159425, 21478275]

約数ペア:

[(1, 21478275), (3, 7159425), (5, 4295655), (7, 3068325), (9, 2386475), (13, 1652175), (15, 1431885), (21, 1022775), (25, 859131), (35, 613665), (39, 550725), (45, 477295), (63, 340925), (65, 330435), (75, 286377), (91, 236025), (105, 204555), (117, 183575), (175, 122733), (195, 110145), (225, 95459), (273, 78675), (315, 68185), (325, 66087), (455, 47205), (525, 40911), (585, 36715), (819, 26225), (975, 22029), (1049, 20475), (1365, 15735), (1575, 13637), (2275, 9441), (2925, 7343), (3147, 6825), (4095, 5245)]