20524455

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{587}}^1$

素因数の和:645

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 22376025

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 37, 45, 63, 105, 111, 135, 185, 189, 259, 315, 333, 555, 587, 777, 945, 999, 1295, 1665, 1761, 2331, 2935, 3885, 4109, 4995, 5283, 6993, 8805, 11655, 12327, 15849, 20545, 21719, 26415, 34965, 36981, 61635, 65157, 79245, 108595, 110943, 152033, 184905, 195471, 325785, 456099, 554715, 586413, 760165, 977355, 1368297, 2280495, 2932065, 4104891, 6841485, 20524455]

約数ペア:

[(1, 20524455), (3, 6841485), (5, 4104891), (7, 2932065), (9, 2280495), (15, 1368297), (21, 977355), (27, 760165), (35, 586413), (37, 554715), (45, 456099), (63, 325785), (105, 195471), (111, 184905), (135, 152033), (185, 110943), (189, 108595), (259, 79245), (315, 65157), (333, 61635), (555, 36981), (587, 34965), (777, 26415), (945, 21719), (999, 20545), (1295, 15849), (1665, 12327), (1761, 11655), (2331, 8805), (2935, 6993), (3885, 5283), (4109, 4995)]