19890975

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{887}}^1$

素因数の和:936

約数の個数: 48

約数和(自身を含む): 36997632

約数和(自身を除く): 17106657

約数列:

[1, 3, 5, 13, 15, 23, 25, 39, 65, 69, 75, 115, 195, 299, 325, 345, 575, 887, 897, 975, 1495, 1725, 2661, 4435, 4485, 7475, 11531, 13305, 20401, 22175, 22425, 34593, 57655, 61203, 66525, 102005, 172965, 265213, 288275, 306015, 510025, 795639, 864825, 1326065, 1530075, 3978195, 6630325, 19890975]

約数ペア:

[(1, 19890975), (3, 6630325), (5, 3978195), (13, 1530075), (15, 1326065), (23, 864825), (25, 795639), (39, 510025), (65, 306015), (69, 288275), (75, 265213), (115, 172965), (195, 102005), (299, 66525), (325, 61203), (345, 57655), (575, 34593), (887, 22425), (897, 22175), (975, 20401), (1495, 13305), (1725, 11531), (2661, 7475), (4435, 4485)]