20400272

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{419}}^1$

素因数の和:623

約数の個数: 40

約数和(自身を含む): 42184800

約数和(自身を除く): 21784528

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 179, 272, 358, 419, 716, 838, 1432, 1676, 2864, 3043, 3352, 6086, 6704, 7123, 12172, 14246, 24344, 28492, 48688, 56984, 75001, 113968, 150002, 300004, 600008, 1200016, 1275017, 2550034, 5100068, 10200136, 20400272]

約数ペア:

[(1, 20400272), (2, 10200136), (4, 5100068), (8, 2550034), (16, 1275017), (17, 1200016), (34, 600008), (68, 300004), (136, 150002), (179, 113968), (272, 75001), (358, 56984), (419, 48688), (716, 28492), (838, 24344), (1432, 14246), (1676, 12172), (2864, 7123), (3043, 6704), (3352, 6086)]