261991413

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{433}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 411640320

約数和(自身を除く): 149648907

約数列:

[1, 3, 9, 23, 37, 69, 79, 111, 207, 237, 333, 433, 711, 851, 1299, 1817, 2553, 2923, 3897, 5451, 7659, 8769, 9959, 16021, 16353, 26307, 29877, 34207, 48063, 67229, 89631, 102621, 144189, 201687, 307863, 368483, 605061, 786761, 1105449, 1265659, 2360283, 3316347, 3796977, 7080849, 11390931, 29110157, 87330471, 261991413]

約数ペア:

[(1, 261991413), (3, 87330471), (9, 29110157), (23, 11390931), (37, 7080849), (69, 3796977), (79, 3316347), (111, 2360283), (207, 1265659), (237, 1105449), (333, 786761), (433, 605061), (711, 368483), (851, 307863), (1299, 201687), (1817, 144189), (2553, 102621), (2923, 89631), (3897, 67229), (5451, 48063), (7659, 34207), (8769, 29877), (9959, 26307), (16021, 16353)]