21490404

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{397}}^1$

素因数の和:764

約数の個数: 48

約数和(自身を含む): 54293568

約数和(自身を除く): 32803164

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 347, 397, 694, 794, 1041, 1191, 1388, 1588, 2082, 2382, 4164, 4511, 4764, 5161, 9022, 10322, 13533, 15483, 18044, 20644, 27066, 30966, 54132, 61932, 137759, 275518, 413277, 551036, 826554, 1653108, 1790867, 3581734, 5372601, 7163468, 10745202, 21490404]

約数ペア:

[(1, 21490404), (2, 10745202), (3, 7163468), (4, 5372601), (6, 3581734), (12, 1790867), (13, 1653108), (26, 826554), (39, 551036), (52, 413277), (78, 275518), (156, 137759), (347, 61932), (397, 54132), (694, 30966), (794, 27066), (1041, 20644), (1191, 18044), (1388, 15483), (1588, 13533), (2082, 10322), (2382, 9022), (4164, 5161), (4511, 4764)]