19999125

素因数分解:

$3^2\times 5^3\times {\mathrm{29}}^1\times {\mathrm{613}}^1$

素因数の和:663

約数の個数: 48

約数和(自身を含む): 37355760

約数和(自身を除く): 17356635

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 125, 145, 225, 261, 375, 435, 613, 725, 1125, 1305, 1839, 2175, 3065, 3625, 5517, 6525, 9195, 10875, 15325, 17777, 27585, 32625, 45975, 53331, 76625, 88885, 137925, 159993, 229875, 266655, 444425, 689625, 799965, 1333275, 2222125, 3999825, 6666375, 19999125]

約数ペア:

[(1, 19999125), (3, 6666375), (5, 3999825), (9, 2222125), (15, 1333275), (25, 799965), (29, 689625), (45, 444425), (75, 266655), (87, 229875), (125, 159993), (145, 137925), (225, 88885), (261, 76625), (375, 53331), (435, 45975), (613, 32625), (725, 27585), (1125, 17777), (1305, 15325), (1839, 10875), (2175, 9195), (3065, 6525), (3625, 5517)]