21931376

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:429

約数の個数: 40

約数和(自身を含む): 43997184

約数和(自身を除く): 22065808

約数列:

[1, 2, 4, 8, 16, 43, 86, 127, 172, 251, 254, 344, 502, 508, 688, 1004, 1016, 2008, 2032, 4016, 5461, 10793, 10922, 21586, 21844, 31877, 43172, 43688, 63754, 86344, 87376, 127508, 172688, 255016, 510032, 1370711, 2741422, 5482844, 10965688, 21931376]

約数ペア:

[(1, 21931376), (2, 10965688), (4, 5482844), (8, 2741422), (16, 1370711), (43, 510032), (86, 255016), (127, 172688), (172, 127508), (251, 87376), (254, 86344), (344, 63754), (502, 43688), (508, 43172), (688, 31877), (1004, 21844), (1016, 21586), (2008, 10922), (2032, 10793), (4016, 5461)]