21715000

素因数分解:

$2^3\times 5^4\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:170

約数の個数: 80

約数和(自身を含む): 52576920

約数和(自身を除く): 30861920

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 43, 50, 86, 100, 101, 125, 172, 200, 202, 215, 250, 344, 404, 430, 500, 505, 625, 808, 860, 1000, 1010, 1075, 1250, 1720, 2020, 2150, 2500, 2525, 4040, 4300, 4343, 5000, 5050, 5375, 8600, 8686, 10100, 10750, 12625, 17372, 20200, 21500, 21715, 25250, 26875, 34744, 43000, 43430, 50500, 53750, 63125, 86860, 101000, 107500, 108575, 126250, 173720, 215000, 217150, 252500, 434300, 505000, 542875, 868600, 1085750, 2171500, 2714375, 4343000, 5428750, 10857500, 21715000]

約数ペア:

[(1, 21715000), (2, 10857500), (4, 5428750), (5, 4343000), (8, 2714375), (10, 2171500), (20, 1085750), (25, 868600), (40, 542875), (43, 505000), (50, 434300), (86, 252500), (100, 217150), (101, 215000), (125, 173720), (172, 126250), (200, 108575), (202, 107500), (215, 101000), (250, 86860), (344, 63125), (404, 53750), (430, 50500), (500, 43430), (505, 43000), (625, 34744), (808, 26875), (860, 25250), (1000, 21715), (1010, 21500), (1075, 20200), (1250, 17372), (1720, 12625), (2020, 10750), (2150, 10100), (2500, 8686), (2525, 8600), (4040, 5375), (4300, 5050), (4343, 5000)]