68720180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1\times {\mathrm{409}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 149882880

約数和(自身を除く): 81162700

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 271, 310, 409, 542, 620, 818, 1084, 1355, 1636, 2045, 2710, 4090, 5420, 8180, 8401, 12679, 16802, 25358, 33604, 42005, 50716, 63395, 84010, 110839, 126790, 168020, 221678, 253580, 443356, 554195, 1108390, 2216780, 3436009, 6872018, 13744036, 17180045, 34360090, 68720180]

約数ペア:

[(1, 68720180), (2, 34360090), (4, 17180045), (5, 13744036), (10, 6872018), (20, 3436009), (31, 2216780), (62, 1108390), (124, 554195), (155, 443356), (271, 253580), (310, 221678), (409, 168020), (542, 126790), (620, 110839), (818, 84010), (1084, 63395), (1355, 50716), (1636, 42005), (2045, 33604), (2710, 25358), (4090, 16802), (5420, 12679), (8180, 8401)]