21475760

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15791}}^1$

素因数の和:15821

約数の個数: 40

約数和(自身を含む): 52871616

約数和(自身を除く): 31395856

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15791, 31582, 63164, 78955, 126328, 157910, 252656, 268447, 315820, 536894, 631640, 1073788, 1263280, 1342235, 2147576, 2684470, 4295152, 5368940, 10737880, 21475760]

約数ペア:

[(1, 21475760), (2, 10737880), (4, 5368940), (5, 4295152), (8, 2684470), (10, 2147576), (16, 1342235), (17, 1263280), (20, 1073788), (34, 631640), (40, 536894), (68, 315820), (80, 268447), (85, 252656), (136, 157910), (170, 126328), (272, 78955), (340, 63164), (680, 31582), (1360, 15791)]