20847890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{563}}^1$

素因数の和:623

約数の個数: 48

約数和(自身を含む): 44912448

約数和(自身を除く): 24064558

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 70, 115, 161, 230, 322, 529, 563, 805, 1058, 1126, 1610, 2645, 2815, 3703, 3941, 5290, 5630, 7406, 7882, 12949, 18515, 19705, 25898, 37030, 39410, 64745, 90643, 129490, 181286, 297827, 453215, 595654, 906430, 1489135, 2084789, 2978270, 4169578, 10423945, 20847890]

約数ペア:

[(1, 20847890), (2, 10423945), (5, 4169578), (7, 2978270), (10, 2084789), (14, 1489135), (23, 906430), (35, 595654), (46, 453215), (70, 297827), (115, 181286), (161, 129490), (230, 90643), (322, 64745), (529, 39410), (563, 37030), (805, 25898), (1058, 19705), (1126, 18515), (1610, 12949), (2645, 7882), (2815, 7406), (3703, 5630), (3941, 5290)]