21828040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{3229}}^1$

素因数の和:3266

約数の個数: 48

約数和(自身を含む): 53198100

約数和(自身を除く): 31370060

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 3229, 3380, 6458, 6760, 12916, 16145, 25832, 32290, 41977, 64580, 83954, 129160, 167908, 209885, 335816, 419770, 545701, 839540, 1091402, 1679080, 2182804, 2728505, 4365608, 5457010, 10914020, 21828040]

約数ペア:

[(1, 21828040), (2, 10914020), (4, 5457010), (5, 4365608), (8, 2728505), (10, 2182804), (13, 1679080), (20, 1091402), (26, 839540), (40, 545701), (52, 419770), (65, 335816), (104, 209885), (130, 167908), (169, 129160), (260, 83954), (338, 64580), (520, 41977), (676, 32290), (845, 25832), (1352, 16145), (1690, 12916), (3229, 6760), (3380, 6458)]