21988785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:298

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 22040655

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 89, 91, 105, 181, 195, 267, 273, 445, 455, 543, 623, 905, 1157, 1267, 1335, 1365, 1869, 2353, 2715, 3115, 3471, 3801, 5785, 6335, 7059, 8099, 9345, 11765, 16109, 16471, 17355, 19005, 24297, 35295, 40495, 48327, 49413, 80545, 82355, 112763, 121485, 209417, 241635, 247065, 338289, 563815, 628251, 1047085, 1465919, 1691445, 3141255, 4397757, 7329595, 21988785]

約数ペア:

[(1, 21988785), (3, 7329595), (5, 4397757), (7, 3141255), (13, 1691445), (15, 1465919), (21, 1047085), (35, 628251), (39, 563815), (65, 338289), (89, 247065), (91, 241635), (105, 209417), (181, 121485), (195, 112763), (267, 82355), (273, 80545), (445, 49413), (455, 48327), (543, 40495), (623, 35295), (905, 24297), (1157, 19005), (1267, 17355), (1335, 16471), (1365, 16109), (1869, 11765), (2353, 9345), (2715, 8099), (3115, 7059), (3471, 6335), (3801, 5785)]