640028205

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{4327}}^1$

素因数の和:4530

約数の個数: 48

約数和(自身を含む): 1174792320

約数和(自身を除く): 534764115

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 173, 285, 519, 855, 865, 1557, 2595, 3287, 4327, 7785, 9861, 12981, 16435, 21635, 29583, 38943, 49305, 64905, 82213, 147915, 194715, 246639, 411065, 739917, 748571, 1233195, 2245713, 3699585, 3742855, 6737139, 11228565, 14222849, 33685695, 42668547, 71114245, 128005641, 213342735, 640028205]

約数ペア:

[(1, 640028205), (3, 213342735), (5, 128005641), (9, 71114245), (15, 42668547), (19, 33685695), (45, 14222849), (57, 11228565), (95, 6737139), (171, 3742855), (173, 3699585), (285, 2245713), (519, 1233195), (855, 748571), (865, 739917), (1557, 411065), (2595, 246639), (3287, 194715), (4327, 147915), (7785, 82213), (9861, 64905), (12981, 49305), (16435, 38943), (21635, 29583)]