21687640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{233}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 53071200

約数和(自身を除く): 31383560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 179, 233, 260, 358, 466, 520, 716, 895, 932, 1165, 1432, 1790, 1864, 2327, 2330, 3029, 3580, 4654, 4660, 6058, 7160, 9308, 9320, 11635, 12116, 15145, 18616, 23270, 24232, 30290, 41707, 46540, 60580, 83414, 93080, 121160, 166828, 208535, 333656, 417070, 542191, 834140, 1084382, 1668280, 2168764, 2710955, 4337528, 5421910, 10843820, 21687640]

約数ペア:

[(1, 21687640), (2, 10843820), (4, 5421910), (5, 4337528), (8, 2710955), (10, 2168764), (13, 1668280), (20, 1084382), (26, 834140), (40, 542191), (52, 417070), (65, 333656), (104, 208535), (130, 166828), (179, 121160), (233, 93080), (260, 83414), (358, 60580), (466, 46540), (520, 41707), (716, 30290), (895, 24232), (932, 23270), (1165, 18616), (1432, 15145), (1790, 12116), (1864, 11635), (2327, 9320), (2330, 9308), (3029, 7160), (3580, 6058), (4654, 4660)]