64985000

素因数分解:

$2^3\times 5^4\times {\mathrm{41}}^1\times {\mathrm{317}}^1$

素因数の和:384

約数の個数: 80

約数和(自身を含む): 156465540

約数和(自身を除く): 91480540

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 200, 205, 250, 317, 328, 410, 500, 625, 634, 820, 1000, 1025, 1250, 1268, 1585, 1640, 2050, 2500, 2536, 3170, 4100, 5000, 5125, 6340, 7925, 8200, 10250, 12680, 12997, 15850, 20500, 25625, 25994, 31700, 39625, 41000, 51250, 51988, 63400, 64985, 79250, 102500, 103976, 129970, 158500, 198125, 205000, 259940, 317000, 324925, 396250, 519880, 649850, 792500, 1299700, 1585000, 1624625, 2599400, 3249250, 6498500, 8123125, 12997000, 16246250, 32492500, 64985000]

約数ペア:

[(1, 64985000), (2, 32492500), (4, 16246250), (5, 12997000), (8, 8123125), (10, 6498500), (20, 3249250), (25, 2599400), (40, 1624625), (41, 1585000), (50, 1299700), (82, 792500), (100, 649850), (125, 519880), (164, 396250), (200, 324925), (205, 317000), (250, 259940), (317, 205000), (328, 198125), (410, 158500), (500, 129970), (625, 103976), (634, 102500), (820, 79250), (1000, 64985), (1025, 63400), (1250, 51988), (1268, 51250), (1585, 41000), (1640, 39625), (2050, 31700), (2500, 25994), (2536, 25625), (3170, 20500), (4100, 15850), (5000, 12997), (5125, 12680), (6340, 10250), (7925, 8200)]