21268240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{233}}^1$

素因数の和:416

約数の個数: 80

約数和(自身を含む): 57103488

約数和(自身を除く): 35835248

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 163, 233, 280, 326, 466, 560, 652, 815, 932, 1141, 1165, 1304, 1630, 1631, 1864, 2282, 2330, 2608, 3260, 3262, 3728, 4564, 4660, 5705, 6520, 6524, 8155, 9128, 9320, 11410, 13040, 13048, 16310, 18256, 18640, 22820, 26096, 32620, 37979, 45640, 65240, 75958, 91280, 130480, 151916, 189895, 265853, 303832, 379790, 531706, 607664, 759580, 1063412, 1329265, 1519160, 2126824, 2658530, 3038320, 4253648, 5317060, 10634120, 21268240]

約数ペア:

[(1, 21268240), (2, 10634120), (4, 5317060), (5, 4253648), (7, 3038320), (8, 2658530), (10, 2126824), (14, 1519160), (16, 1329265), (20, 1063412), (28, 759580), (35, 607664), (40, 531706), (56, 379790), (70, 303832), (80, 265853), (112, 189895), (140, 151916), (163, 130480), (233, 91280), (280, 75958), (326, 65240), (466, 45640), (560, 37979), (652, 32620), (815, 26096), (932, 22820), (1141, 18640), (1165, 18256), (1304, 16310), (1630, 13048), (1631, 13040), (1864, 11410), (2282, 9320), (2330, 9128), (2608, 8155), (3260, 6524), (3262, 6520), (3728, 5705), (4564, 4660)]