20918625

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{613}}^1$

素因数の和:651

約数の個数: 64

約数和(自身を含む): 42911232

約数和(自身を除く): 21992607

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 65, 75, 91, 105, 125, 175, 195, 273, 325, 375, 455, 525, 613, 875, 975, 1365, 1625, 1839, 2275, 2625, 3065, 4291, 4875, 6825, 7969, 9195, 11375, 12873, 15325, 21455, 23907, 34125, 39845, 45975, 55783, 64365, 76625, 107275, 119535, 167349, 199225, 229875, 278915, 321825, 536375, 597675, 836745, 996125, 1394575, 1609125, 2988375, 4183725, 6972875, 20918625]

約数ペア:

[(1, 20918625), (3, 6972875), (5, 4183725), (7, 2988375), (13, 1609125), (15, 1394575), (21, 996125), (25, 836745), (35, 597675), (39, 536375), (65, 321825), (75, 278915), (91, 229875), (105, 199225), (125, 167349), (175, 119535), (195, 107275), (273, 76625), (325, 64365), (375, 55783), (455, 45975), (525, 39845), (613, 34125), (875, 23907), (975, 21455), (1365, 15325), (1625, 12873), (1839, 11375), (2275, 9195), (2625, 7969), (3065, 6825), (4291, 4875)]