21350511

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 38438400

約数和(自身を除く): 17087889

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 131, 199, 273, 393, 597, 819, 917, 1179, 1393, 1703, 1791, 2587, 2751, 4179, 5109, 7761, 8253, 11921, 12537, 15327, 18109, 23283, 26069, 35763, 54327, 78207, 107289, 162981, 182483, 234621, 338897, 547449, 1016691, 1642347, 2372279, 3050073, 7116837, 21350511]

約数ペア:

[(1, 21350511), (3, 7116837), (7, 3050073), (9, 2372279), (13, 1642347), (21, 1016691), (39, 547449), (63, 338897), (91, 234621), (117, 182483), (131, 162981), (199, 107289), (273, 78207), (393, 54327), (597, 35763), (819, 26069), (917, 23283), (1179, 18109), (1393, 15327), (1703, 12537), (1791, 11921), (2587, 8253), (2751, 7761), (4179, 5109)]