21585140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1321}}^1$

素因数の和:1392

約数の個数: 48

約数和(自身を含む): 48861120

約数和(自身を除く): 27275980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1321, 1634, 2642, 3268, 4085, 5284, 6605, 8170, 13210, 16340, 25099, 26420, 50198, 56803, 100396, 113606, 125495, 227212, 250990, 284015, 501980, 568030, 1079257, 1136060, 2158514, 4317028, 5396285, 10792570, 21585140]

約数ペア:

[(1, 21585140), (2, 10792570), (4, 5396285), (5, 4317028), (10, 2158514), (19, 1136060), (20, 1079257), (38, 568030), (43, 501980), (76, 284015), (86, 250990), (95, 227212), (172, 125495), (190, 113606), (215, 100396), (380, 56803), (430, 50198), (817, 26420), (860, 25099), (1321, 16340), (1634, 13210), (2642, 8170), (3268, 6605), (4085, 5284)]