21538460

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{2141}}^1$

素因数の和:2653

約数の個数: 24

約数和(自身を含む): 45341856

約数和(自身を除く): 23803396

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 2012, 2141, 2515, 4282, 5030, 8564, 10060, 10705, 21410, 42820, 1076923, 2153846, 4307692, 5384615, 10769230, 21538460]

約数ペア:

[(1, 21538460), (2, 10769230), (4, 5384615), (5, 4307692), (10, 2153846), (20, 1076923), (503, 42820), (1006, 21410), (2012, 10705), (2141, 10060), (2515, 8564), (4282, 5030)]