21700638

素因数分解:

$2^1\times 3^2\times {\mathrm{23}}^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:150

約数の個数: 72

約数和(自身を含む): 51243192

約数和(自身を除く): 29542554

約数列:

[1, 2, 3, 6, 9, 18, 23, 43, 46, 53, 69, 86, 106, 129, 138, 159, 207, 258, 318, 387, 414, 477, 529, 774, 954, 989, 1058, 1219, 1587, 1978, 2279, 2438, 2967, 3174, 3657, 4558, 4761, 5934, 6837, 7314, 8901, 9522, 10971, 13674, 17802, 20511, 21942, 22747, 28037, 41022, 45494, 52417, 56074, 68241, 84111, 104834, 136482, 157251, 168222, 204723, 252333, 314502, 409446, 471753, 504666, 943506, 1205591, 2411182, 3616773, 7233546, 10850319, 21700638]

約数ペア:

[(1, 21700638), (2, 10850319), (3, 7233546), (6, 3616773), (9, 2411182), (18, 1205591), (23, 943506), (43, 504666), (46, 471753), (53, 409446), (69, 314502), (86, 252333), (106, 204723), (129, 168222), (138, 157251), (159, 136482), (207, 104834), (258, 84111), (318, 68241), (387, 56074), (414, 52417), (477, 45494), (529, 41022), (774, 28037), (954, 22747), (989, 21942), (1058, 20511), (1219, 17802), (1587, 13674), (1978, 10971), (2279, 9522), (2438, 8901), (2967, 7314), (3174, 6837), (3657, 5934), (4558, 4761)]