21200530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 44579808

約数和(自身を除く): 23379278

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 53, 65, 85, 106, 130, 170, 181, 221, 265, 362, 442, 530, 689, 901, 905, 1105, 1378, 1802, 1810, 2210, 2353, 3077, 3445, 4505, 4706, 6154, 6890, 9010, 9593, 11713, 11765, 15385, 19186, 23426, 23530, 30770, 40001, 47965, 58565, 80002, 95930, 117130, 124709, 163081, 200005, 249418, 326162, 400010, 623545, 815405, 1247090, 1630810, 2120053, 4240106, 10600265, 21200530]

約数ペア:

[(1, 21200530), (2, 10600265), (5, 4240106), (10, 2120053), (13, 1630810), (17, 1247090), (26, 815405), (34, 623545), (53, 400010), (65, 326162), (85, 249418), (106, 200005), (130, 163081), (170, 124709), (181, 117130), (221, 95930), (265, 80002), (362, 58565), (442, 47965), (530, 40001), (689, 30770), (901, 23530), (905, 23426), (1105, 19186), (1378, 15385), (1802, 11765), (1810, 11713), (2210, 9593), (2353, 9010), (3077, 6890), (3445, 6154), (4505, 4706)]