20551850

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:156

約数の個数: 72

約数和(自身を含む): 43538880

約数和(自身を除く): 22987030

約数列:

[1, 2, 5, 10, 11, 22, 25, 43, 50, 55, 79, 86, 110, 121, 158, 215, 242, 275, 395, 430, 473, 550, 605, 790, 869, 946, 1075, 1210, 1738, 1975, 2150, 2365, 3025, 3397, 3950, 4345, 4730, 5203, 6050, 6794, 8690, 9559, 10406, 11825, 16985, 19118, 21725, 23650, 26015, 33970, 37367, 43450, 47795, 52030, 74734, 84925, 95590, 130075, 169850, 186835, 238975, 260150, 373670, 411037, 477950, 822074, 934175, 1868350, 2055185, 4110370, 10275925, 20551850]

約数ペア:

[(1, 20551850), (2, 10275925), (5, 4110370), (10, 2055185), (11, 1868350), (22, 934175), (25, 822074), (43, 477950), (50, 411037), (55, 373670), (79, 260150), (86, 238975), (110, 186835), (121, 169850), (158, 130075), (215, 95590), (242, 84925), (275, 74734), (395, 52030), (430, 47795), (473, 43450), (550, 37367), (605, 33970), (790, 26015), (869, 23650), (946, 21725), (1075, 19118), (1210, 16985), (1738, 11825), (1975, 10406), (2150, 9559), (2365, 8690), (3025, 6794), (3397, 6050), (3950, 5203), (4345, 4730)]