20410000

素因数分解:

$2^4\times 5^4\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:198

約数の個数: 100

約数和(自身を含む): 53554732

約数和(自身を除く): 33144732

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 125, 130, 157, 200, 208, 250, 260, 314, 325, 400, 500, 520, 625, 628, 650, 785, 1000, 1040, 1250, 1256, 1300, 1570, 1625, 2000, 2041, 2500, 2512, 2600, 3140, 3250, 3925, 4082, 5000, 5200, 6280, 6500, 7850, 8125, 8164, 10000, 10205, 12560, 13000, 15700, 16250, 16328, 19625, 20410, 26000, 31400, 32500, 32656, 39250, 40820, 51025, 62800, 65000, 78500, 81640, 98125, 102050, 130000, 157000, 163280, 196250, 204100, 255125, 314000, 392500, 408200, 510250, 785000, 816400, 1020500, 1275625, 1570000, 2041000, 2551250, 4082000, 5102500, 10205000, 20410000]

約数ペア:

[(1, 20410000), (2, 10205000), (4, 5102500), (5, 4082000), (8, 2551250), (10, 2041000), (13, 1570000), (16, 1275625), (20, 1020500), (25, 816400), (26, 785000), (40, 510250), (50, 408200), (52, 392500), (65, 314000), (80, 255125), (100, 204100), (104, 196250), (125, 163280), (130, 157000), (157, 130000), (200, 102050), (208, 98125), (250, 81640), (260, 78500), (314, 65000), (325, 62800), (400, 51025), (500, 40820), (520, 39250), (625, 32656), (628, 32500), (650, 31400), (785, 26000), (1000, 20410), (1040, 19625), (1250, 16328), (1256, 16250), (1300, 15700), (1570, 13000), (1625, 12560), (2000, 10205), (2041, 10000), (2500, 8164), (2512, 8125), (2600, 7850), (3140, 6500), (3250, 6280), (3925, 5200), (4082, 5000)]