20827940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{401}}^1$

素因数の和:477

約数の個数: 72

約数和(自身を含む): 51968952

約数和(自身を除く): 31141012

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 53, 70, 98, 106, 140, 196, 212, 245, 265, 371, 401, 490, 530, 742, 802, 980, 1060, 1484, 1604, 1855, 2005, 2597, 2807, 3710, 4010, 5194, 5614, 7420, 8020, 10388, 11228, 12985, 14035, 19649, 21253, 25970, 28070, 39298, 42506, 51940, 56140, 78596, 85012, 98245, 106265, 148771, 196490, 212530, 297542, 392980, 425060, 595084, 743855, 1041397, 1487710, 2082794, 2975420, 4165588, 5206985, 10413970, 20827940]

約数ペア:

[(1, 20827940), (2, 10413970), (4, 5206985), (5, 4165588), (7, 2975420), (10, 2082794), (14, 1487710), (20, 1041397), (28, 743855), (35, 595084), (49, 425060), (53, 392980), (70, 297542), (98, 212530), (106, 196490), (140, 148771), (196, 106265), (212, 98245), (245, 85012), (265, 78596), (371, 56140), (401, 51940), (490, 42506), (530, 39298), (742, 28070), (802, 25970), (980, 21253), (1060, 19649), (1484, 14035), (1604, 12985), (1855, 11228), (2005, 10388), (2597, 8020), (2807, 7420), (3710, 5614), (4010, 5194)]