12920800

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{521}}^1$

素因数の和:572

約数の個数: 72

約数和(自身を含む): 32622912

約数和(自身を除く): 19702112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 155, 160, 200, 248, 310, 400, 496, 521, 620, 775, 800, 992, 1042, 1240, 1550, 2084, 2480, 2605, 3100, 4168, 4960, 5210, 6200, 8336, 10420, 12400, 13025, 16151, 16672, 20840, 24800, 26050, 32302, 41680, 52100, 64604, 80755, 83360, 104200, 129208, 161510, 208400, 258416, 323020, 403775, 416800, 516832, 646040, 807550, 1292080, 1615100, 2584160, 3230200, 6460400, 12920800]

約数ペア:

[(1, 12920800), (2, 6460400), (4, 3230200), (5, 2584160), (8, 1615100), (10, 1292080), (16, 807550), (20, 646040), (25, 516832), (31, 416800), (32, 403775), (40, 323020), (50, 258416), (62, 208400), (80, 161510), (100, 129208), (124, 104200), (155, 83360), (160, 80755), (200, 64604), (248, 52100), (310, 41680), (400, 32302), (496, 26050), (521, 24800), (620, 20840), (775, 16672), (800, 16151), (992, 13025), (1042, 12400), (1240, 10420), (1550, 8336), (2084, 6200), (2480, 5210), (2605, 4960), (3100, 4168)]