21967065

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 19965735

約数列:

[1, 3, 5, 9, 15, 27, 29, 31, 45, 87, 93, 135, 145, 155, 181, 261, 279, 435, 465, 543, 783, 837, 899, 905, 1305, 1395, 1629, 2697, 2715, 3915, 4185, 4495, 4887, 5249, 5611, 8091, 8145, 13485, 15747, 16833, 24273, 24435, 26245, 28055, 40455, 47241, 50499, 78735, 84165, 121365, 141723, 151497, 162719, 236205, 252495, 488157, 708615, 757485, 813595, 1464471, 2440785, 4393413, 7322355, 21967065]

約数ペア:

[(1, 21967065), (3, 7322355), (5, 4393413), (9, 2440785), (15, 1464471), (27, 813595), (29, 757485), (31, 708615), (45, 488157), (87, 252495), (93, 236205), (135, 162719), (145, 151497), (155, 141723), (181, 121365), (261, 84165), (279, 78735), (435, 50499), (465, 47241), (543, 40455), (783, 28055), (837, 26245), (899, 24435), (905, 24273), (1305, 16833), (1395, 15747), (1629, 13485), (2697, 8145), (2715, 8091), (3915, 5611), (4185, 5249), (4495, 4887)]