20906380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{163}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 49469616

約数和(自身を除く): 28563236

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 53, 55, 106, 110, 121, 163, 212, 220, 242, 265, 326, 484, 530, 583, 605, 652, 815, 1060, 1166, 1210, 1630, 1793, 2332, 2420, 2915, 3260, 3586, 5830, 6413, 7172, 8639, 8965, 11660, 12826, 17278, 17930, 19723, 25652, 32065, 34556, 35860, 39446, 43195, 64130, 78892, 86390, 95029, 98615, 128260, 172780, 190058, 197230, 380116, 394460, 475145, 950290, 1045319, 1900580, 2090638, 4181276, 5226595, 10453190, 20906380]

約数ペア:

[(1, 20906380), (2, 10453190), (4, 5226595), (5, 4181276), (10, 2090638), (11, 1900580), (20, 1045319), (22, 950290), (44, 475145), (53, 394460), (55, 380116), (106, 197230), (110, 190058), (121, 172780), (163, 128260), (212, 98615), (220, 95029), (242, 86390), (265, 78892), (326, 64130), (484, 43195), (530, 39446), (583, 35860), (605, 34556), (652, 32065), (815, 25652), (1060, 19723), (1166, 17930), (1210, 17278), (1630, 12826), (1793, 11660), (2332, 8965), (2420, 8639), (2915, 7172), (3260, 6413), (3586, 5830)]