20490405

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 36365760

約数和(自身を除く): 15875355

約数列:

[1, 3, 5, 13, 15, 39, 59, 65, 137, 169, 177, 195, 295, 411, 507, 685, 767, 845, 885, 1781, 2055, 2301, 2535, 3835, 5343, 8083, 8905, 9971, 11505, 23153, 24249, 26715, 29913, 40415, 49855, 69459, 105079, 115765, 121245, 149565, 315237, 347295, 525395, 1366027, 1576185, 4098081, 6830135, 20490405]

約数ペア:

[(1, 20490405), (3, 6830135), (5, 4098081), (13, 1576185), (15, 1366027), (39, 525395), (59, 347295), (65, 315237), (137, 149565), (169, 121245), (177, 115765), (195, 105079), (295, 69459), (411, 49855), (507, 40415), (685, 29913), (767, 26715), (845, 24249), (885, 23153), (1781, 11505), (2055, 9971), (2301, 8905), (2535, 8083), (3835, 5343)]