19991775

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6199}}^1$

素因数の和:6255

約数の個数: 24

約数和(自身を含む): 33827200

約数和(自身を除く): 13835425

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6199, 18597, 30995, 92985, 154975, 266557, 464925, 799671, 1332785, 3998355, 6663925, 19991775]

約数ペア:

[(1, 19991775), (3, 6663925), (5, 3998355), (15, 1332785), (25, 799671), (43, 464925), (75, 266557), (129, 154975), (215, 92985), (645, 30995), (1075, 18597), (3225, 6199)]