20204660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:465

約数の個数: 72

約数和(自身を含む): 50417640

約数和(自身を除く): 30212980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 53, 70, 98, 106, 140, 196, 212, 245, 265, 371, 389, 490, 530, 742, 778, 980, 1060, 1484, 1556, 1855, 1945, 2597, 2723, 3710, 3890, 5194, 5446, 7420, 7780, 10388, 10892, 12985, 13615, 19061, 20617, 25970, 27230, 38122, 41234, 51940, 54460, 76244, 82468, 95305, 103085, 144319, 190610, 206170, 288638, 381220, 412340, 577276, 721595, 1010233, 1443190, 2020466, 2886380, 4040932, 5051165, 10102330, 20204660]

約数ペア:

[(1, 20204660), (2, 10102330), (4, 5051165), (5, 4040932), (7, 2886380), (10, 2020466), (14, 1443190), (20, 1010233), (28, 721595), (35, 577276), (49, 412340), (53, 381220), (70, 288638), (98, 206170), (106, 190610), (140, 144319), (196, 103085), (212, 95305), (245, 82468), (265, 76244), (371, 54460), (389, 51940), (490, 41234), (530, 38122), (742, 27230), (778, 25970), (980, 20617), (1060, 19061), (1484, 13615), (1556, 12985), (1855, 10892), (1945, 10388), (2597, 7780), (2723, 7420), (3710, 5446), (3890, 5194)]