21236560

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1483}}^1$

素因数の和:1675

約数の個数: 40

約数和(自身を含む): 49684320

約数和(自身を除く): 28447760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1432, 1483, 1790, 2864, 2966, 3580, 5932, 7160, 7415, 11864, 14320, 14830, 23728, 29660, 59320, 118640, 265457, 530914, 1061828, 1327285, 2123656, 2654570, 4247312, 5309140, 10618280, 21236560]

約数ペア:

[(1, 21236560), (2, 10618280), (4, 5309140), (5, 4247312), (8, 2654570), (10, 2123656), (16, 1327285), (20, 1061828), (40, 530914), (80, 265457), (179, 118640), (358, 59320), (716, 29660), (895, 23728), (1432, 14830), (1483, 14320), (1790, 11864), (2864, 7415), (2966, 7160), (3580, 5932)]