19881884

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 19744612

約数列:

[1, 2, 4, 11, 22, 41, 44, 82, 103, 107, 164, 206, 214, 412, 428, 451, 902, 1133, 1177, 1804, 2266, 2354, 4223, 4387, 4532, 4708, 8446, 8774, 11021, 16892, 17548, 22042, 44084, 46453, 48257, 92906, 96514, 121231, 185812, 193028, 242462, 451861, 484924, 903722, 1807444, 4970471, 9940942, 19881884]

約数ペア:

[(1, 19881884), (2, 9940942), (4, 4970471), (11, 1807444), (22, 903722), (41, 484924), (44, 451861), (82, 242462), (103, 193028), (107, 185812), (164, 121231), (206, 96514), (214, 92906), (412, 48257), (428, 46453), (451, 44084), (902, 22042), (1133, 17548), (1177, 16892), (1804, 11021), (2266, 8774), (2354, 8446), (4223, 4708), (4387, 4532)]