21753515

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 31712256

約数和(自身を除く): 9958741

約数列:

[1, 5, 7, 23, 35, 61, 115, 161, 305, 427, 443, 805, 1403, 2135, 2215, 3101, 7015, 9821, 10189, 15505, 27023, 49105, 50945, 71323, 135115, 189161, 356615, 621529, 945805, 3107645, 4350703, 21753515]

約数ペア:

[(1, 21753515), (5, 4350703), (7, 3107645), (23, 945805), (35, 621529), (61, 356615), (115, 189161), (161, 135115), (305, 71323), (427, 50945), (443, 49105), (805, 27023), (1403, 15505), (2135, 10189), (2215, 9821), (3101, 7015)]