64775980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1\times {\mathrm{241}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 139043520

約数和(自身を除く): 74267540

約数列:

[1, 2, 4, 5, 10, 20, 89, 151, 178, 241, 302, 356, 445, 482, 604, 755, 890, 964, 1205, 1510, 1780, 2410, 3020, 4820, 13439, 21449, 26878, 36391, 42898, 53756, 67195, 72782, 85796, 107245, 134390, 145564, 181955, 214490, 268780, 363910, 428980, 727820, 3238799, 6477598, 12955196, 16193995, 32387990, 64775980]

約数ペア:

[(1, 64775980), (2, 32387990), (4, 16193995), (5, 12955196), (10, 6477598), (20, 3238799), (89, 727820), (151, 428980), (178, 363910), (241, 268780), (302, 214490), (356, 181955), (445, 145564), (482, 134390), (604, 107245), (755, 85796), (890, 72782), (964, 67195), (1205, 53756), (1510, 42898), (1780, 36391), (2410, 26878), (3020, 21449), (4820, 13439)]