21680841

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 36892800

約数和(自身を除く): 15211959

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 149, 169, 273, 287, 447, 507, 533, 861, 1043, 1183, 1599, 1937, 3129, 3549, 3731, 5811, 6109, 6929, 11193, 13559, 18327, 20787, 25181, 40677, 42763, 48503, 75543, 79417, 128289, 145509, 176267, 238251, 528801, 555919, 1032421, 1667757, 3097263, 7226947, 21680841]

約数ペア:

[(1, 21680841), (3, 7226947), (7, 3097263), (13, 1667757), (21, 1032421), (39, 555919), (41, 528801), (91, 238251), (123, 176267), (149, 145509), (169, 128289), (273, 79417), (287, 75543), (447, 48503), (507, 42763), (533, 40677), (861, 25181), (1043, 20787), (1183, 18327), (1599, 13559), (1937, 11193), (3129, 6929), (3549, 6109), (3731, 5811)]