21097895

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{521}}^1$

素因数の和:635

約数の個数: 32

約数和(自身を含む): 31570560

約数和(自身を除く): 10472665

約数列:

[1, 5, 7, 13, 35, 65, 89, 91, 445, 455, 521, 623, 1157, 2605, 3115, 3647, 5785, 6773, 8099, 18235, 33865, 40495, 46369, 47411, 231845, 237055, 324583, 602797, 1622915, 3013985, 4219579, 21097895]

約数ペア:

[(1, 21097895), (5, 4219579), (7, 3013985), (13, 1622915), (35, 602797), (65, 324583), (89, 237055), (91, 231845), (445, 47411), (455, 46369), (521, 40495), (623, 33865), (1157, 18235), (2605, 8099), (3115, 6773), (3647, 5785)]