18871170020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1\times {\mathrm{74419}}^1$

素因数の和:74868

約数の個数: 48

約数和(自身を含む): 41008396800

約数和(自身を除く): 22137226780

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 409, 620, 818, 1636, 2045, 4090, 8180, 12679, 25358, 50716, 63395, 74419, 126790, 148838, 253580, 297676, 372095, 744190, 1488380, 2306989, 4613978, 9227956, 11534945, 23069890, 30437371, 46139780, 60874742, 121749484, 152186855, 304373710, 608747420, 943558501, 1887117002, 3774234004, 4717792505, 9435585010, 18871170020]

約数ペア:

[(1, 18871170020), (2, 9435585010), (4, 4717792505), (5, 3774234004), (10, 1887117002), (20, 943558501), (31, 608747420), (62, 304373710), (124, 152186855), (155, 121749484), (310, 60874742), (409, 46139780), (620, 30437371), (818, 23069890), (1636, 11534945), (2045, 9227956), (4090, 4613978), (8180, 2306989), (12679, 1488380), (25358, 744190), (50716, 372095), (63395, 297676), (74419, 253580), (126790, 148838)]