21147285985

素因数分解:

$5^1\times 7^3\times {\mathrm{47}}^1\times {\mathrm{167}}^1\times {\mathrm{1571}}^1$

素因数の和:1811

約数の個数: 64

約数和(自身を含む): 30423859200

約数和(自身を除く): 9276573215

約数列:

[1, 5, 7, 35, 47, 49, 167, 235, 245, 329, 343, 835, 1169, 1571, 1645, 1715, 2303, 5845, 7849, 7855, 8183, 10997, 11515, 16121, 39245, 40915, 54943, 54985, 57281, 73837, 76979, 80605, 262357, 274715, 286405, 369185, 384601, 384895, 516859, 538853, 1311785, 1836499, 1923005, 2584295, 2692207, 2694265, 3618013, 9182495, 12330779, 12855493, 13461035, 18090065, 25326091, 61653895, 64277465, 86315453, 89988451, 126630455, 431577265, 449942255, 604208171, 3021040855, 4229457197, 21147285985]

約数ペア:

[(1, 21147285985), (5, 4229457197), (7, 3021040855), (35, 604208171), (47, 449942255), (49, 431577265), (167, 126630455), (235, 89988451), (245, 86315453), (329, 64277465), (343, 61653895), (835, 25326091), (1169, 18090065), (1571, 13461035), (1645, 12855493), (1715, 12330779), (2303, 9182495), (5845, 3618013), (7849, 2694265), (7855, 2692207), (8183, 2584295), (10997, 1923005), (11515, 1836499), (16121, 1311785), (39245, 538853), (40915, 516859), (54943, 384895), (54985, 384601), (57281, 369185), (73837, 286405), (76979, 274715), (80605, 262357)]