81171560

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{151}}^2$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 185919300

約数和(自身を除く): 104747740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 151, 178, 302, 356, 445, 604, 712, 755, 890, 1208, 1510, 1780, 3020, 3560, 6040, 13439, 22801, 26878, 45602, 53756, 67195, 91204, 107512, 114005, 134390, 182408, 228010, 268780, 456020, 537560, 912040, 2029289, 4058578, 8117156, 10146445, 16234312, 20292890, 40585780, 81171560]

約数ペア:

[(1, 81171560), (2, 40585780), (4, 20292890), (5, 16234312), (8, 10146445), (10, 8117156), (20, 4058578), (40, 2029289), (89, 912040), (151, 537560), (178, 456020), (302, 268780), (356, 228010), (445, 182408), (604, 134390), (712, 114005), (755, 107512), (890, 91204), (1208, 67195), (1510, 53756), (1780, 45602), (3020, 26878), (3560, 22801), (6040, 13439)]