21264325

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{503}}^1$

素因数の和:621

約数の個数: 24

約数和(自身を含む): 28123200

約数和(自身を除く): 6858875

約数列:

[1, 5, 19, 25, 89, 95, 445, 475, 503, 1691, 2225, 2515, 8455, 9557, 12575, 42275, 44767, 47785, 223835, 238925, 850573, 1119175, 4252865, 21264325]

約数ペア:

[(1, 21264325), (5, 4252865), (19, 1119175), (25, 850573), (89, 238925), (95, 223835), (445, 47785), (475, 44767), (503, 42275), (1691, 12575), (2225, 9557), (2515, 8455)]