20344480

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9781}}^1$

素因数の和:9809

約数の個数: 48

約数和(自身を含む): 51766344

約数和(自身を除く): 31421864

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9781, 19562, 39124, 48905, 78248, 97810, 127153, 156496, 195620, 254306, 312992, 391240, 508612, 635765, 782480, 1017224, 1271530, 1564960, 2034448, 2543060, 4068896, 5086120, 10172240, 20344480]

約数ペア:

[(1, 20344480), (2, 10172240), (4, 5086120), (5, 4068896), (8, 2543060), (10, 2034448), (13, 1564960), (16, 1271530), (20, 1017224), (26, 782480), (32, 635765), (40, 508612), (52, 391240), (65, 312992), (80, 254306), (104, 195620), (130, 156496), (160, 127153), (208, 97810), (260, 78248), (416, 48905), (520, 39124), (1040, 19562), (2080, 9781)]