21338775

素因数分解:

$3^3\times 5^2\times {\mathrm{101}}^1\times {\mathrm{313}}^1$

素因数の和:433

約数の個数: 48

約数和(自身を含む): 39714720

約数和(自身を除く): 18375945

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 101, 135, 225, 303, 313, 505, 675, 909, 939, 1515, 1565, 2525, 2727, 2817, 4545, 4695, 7575, 7825, 8451, 13635, 14085, 22725, 23475, 31613, 42255, 68175, 70425, 94839, 158065, 211275, 284517, 474195, 790325, 853551, 1422585, 2370975, 4267755, 7112925, 21338775]

約数ペア:

[(1, 21338775), (3, 7112925), (5, 4267755), (9, 2370975), (15, 1422585), (25, 853551), (27, 790325), (45, 474195), (75, 284517), (101, 211275), (135, 158065), (225, 94839), (303, 70425), (313, 68175), (505, 42255), (675, 31613), (909, 23475), (939, 22725), (1515, 14085), (1565, 13635), (2525, 8451), (2727, 7825), (2817, 7575), (4545, 4695)]