21246420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27239}}^1$

素因数の和:27264

約数の個数: 48

約数和(自身を含む): 64068480

約数和(自身を除く): 42822060

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27239, 54478, 81717, 108956, 136195, 163434, 272390, 326868, 354107, 408585, 544780, 708214, 817170, 1062321, 1416428, 1634340, 1770535, 2124642, 3541070, 4249284, 5311605, 7082140, 10623210, 21246420]

約数ペア:

[(1, 21246420), (2, 10623210), (3, 7082140), (4, 5311605), (5, 4249284), (6, 3541070), (10, 2124642), (12, 1770535), (13, 1634340), (15, 1416428), (20, 1062321), (26, 817170), (30, 708214), (39, 544780), (52, 408585), (60, 354107), (65, 326868), (78, 272390), (130, 163434), (156, 136195), (195, 108956), (260, 81717), (390, 54478), (780, 27239)]