21062120

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{271}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 49939200

約数和(自身を除く): 28877080

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 67, 116, 134, 145, 232, 268, 271, 290, 335, 536, 542, 580, 670, 1084, 1160, 1340, 1355, 1943, 2168, 2680, 2710, 3886, 5420, 7772, 7859, 9715, 10840, 15544, 15718, 18157, 19430, 31436, 36314, 38860, 39295, 62872, 72628, 77720, 78590, 90785, 145256, 157180, 181570, 314360, 363140, 526553, 726280, 1053106, 2106212, 2632765, 4212424, 5265530, 10531060, 21062120]

約数ペア:

[(1, 21062120), (2, 10531060), (4, 5265530), (5, 4212424), (8, 2632765), (10, 2106212), (20, 1053106), (29, 726280), (40, 526553), (58, 363140), (67, 314360), (116, 181570), (134, 157180), (145, 145256), (232, 90785), (268, 78590), (271, 77720), (290, 72628), (335, 62872), (536, 39295), (542, 38860), (580, 36314), (670, 31436), (1084, 19430), (1160, 18157), (1340, 15718), (1355, 15544), (1943, 10840), (2168, 9715), (2680, 7859), (2710, 7772), (3886, 5420)]