81385000

素因数分解:

$2^3\times 5^4\times {\mathrm{41}}^1\times {\mathrm{397}}^1$

素因数の和:464

約数の個数: 80

約数和(自身を含む): 195827940

約数和(自身を除く): 114442940

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 200, 205, 250, 328, 397, 410, 500, 625, 794, 820, 1000, 1025, 1250, 1588, 1640, 1985, 2050, 2500, 3176, 3970, 4100, 5000, 5125, 7940, 8200, 9925, 10250, 15880, 16277, 19850, 20500, 25625, 32554, 39700, 41000, 49625, 51250, 65108, 79400, 81385, 99250, 102500, 130216, 162770, 198500, 205000, 248125, 325540, 397000, 406925, 496250, 651080, 813850, 992500, 1627700, 1985000, 2034625, 3255400, 4069250, 8138500, 10173125, 16277000, 20346250, 40692500, 81385000]

約数ペア:

[(1, 81385000), (2, 40692500), (4, 20346250), (5, 16277000), (8, 10173125), (10, 8138500), (20, 4069250), (25, 3255400), (40, 2034625), (41, 1985000), (50, 1627700), (82, 992500), (100, 813850), (125, 651080), (164, 496250), (200, 406925), (205, 397000), (250, 325540), (328, 248125), (397, 205000), (410, 198500), (500, 162770), (625, 130216), (794, 102500), (820, 99250), (1000, 81385), (1025, 79400), (1250, 65108), (1588, 51250), (1640, 49625), (1985, 41000), (2050, 39700), (2500, 32554), (3176, 25625), (3970, 20500), (4100, 19850), (5000, 16277), (5125, 15880), (7940, 10250), (8200, 9925)]