21349120

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1283}}^1$

素因数の和:1317

約数の個数: 72

約数和(自身を含む): 55114416

約数和(自身を除く): 33765296

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1280, 1283, 1664, 2080, 2566, 3328, 4160, 5132, 6415, 8320, 10264, 12830, 16640, 16679, 20528, 25660, 33358, 41056, 51320, 66716, 82112, 83395, 102640, 133432, 164224, 166790, 205280, 266864, 328448, 333580, 410560, 533728, 667160, 821120, 1067456, 1334320, 1642240, 2134912, 2668640, 4269824, 5337280, 10674560, 21349120]

約数ペア:

[(1, 21349120), (2, 10674560), (4, 5337280), (5, 4269824), (8, 2668640), (10, 2134912), (13, 1642240), (16, 1334320), (20, 1067456), (26, 821120), (32, 667160), (40, 533728), (52, 410560), (64, 333580), (65, 328448), (80, 266864), (104, 205280), (128, 166790), (130, 164224), (160, 133432), (208, 102640), (256, 83395), (260, 82112), (320, 66716), (416, 51320), (520, 41056), (640, 33358), (832, 25660), (1040, 20528), (1280, 16679), (1283, 16640), (1664, 12830), (2080, 10264), (2566, 8320), (3328, 6415), (4160, 5132)]