19620400

素因数分解:

$2^4\times 5^2\times {\mathrm{181}}^1\times {\mathrm{271}}^1$

素因数の和:470

約数の個数: 60

約数和(自身を含む): 47573344

約数和(自身を除く): 27952944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 181, 200, 271, 362, 400, 542, 724, 905, 1084, 1355, 1448, 1810, 2168, 2710, 2896, 3620, 4336, 4525, 5420, 6775, 7240, 9050, 10840, 13550, 14480, 18100, 21680, 27100, 36200, 49051, 54200, 72400, 98102, 108400, 196204, 245255, 392408, 490510, 784816, 981020, 1226275, 1962040, 2452550, 3924080, 4905100, 9810200, 19620400]

約数ペア:

[(1, 19620400), (2, 9810200), (4, 4905100), (5, 3924080), (8, 2452550), (10, 1962040), (16, 1226275), (20, 981020), (25, 784816), (40, 490510), (50, 392408), (80, 245255), (100, 196204), (181, 108400), (200, 98102), (271, 72400), (362, 54200), (400, 49051), (542, 36200), (724, 27100), (905, 21680), (1084, 18100), (1355, 14480), (1448, 13550), (1810, 10840), (2168, 9050), (2710, 7240), (2896, 6775), (3620, 5420), (4336, 4525)]