21408681

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{467}}^1$

素因数の和:573

約数の個数: 32

約数和(自身を含む): 34145280

約数和(自身を除く): 12736599

約数列:

[1, 3, 7, 21, 37, 59, 111, 177, 259, 413, 467, 777, 1239, 1401, 2183, 3269, 6549, 9807, 15281, 17279, 27553, 45843, 51837, 82659, 120953, 192871, 362859, 578613, 1019461, 3058383, 7136227, 21408681]

約数ペア:

[(1, 21408681), (3, 7136227), (7, 3058383), (21, 1019461), (37, 578613), (59, 362859), (111, 192871), (177, 120953), (259, 82659), (413, 51837), (467, 45843), (777, 27553), (1239, 17279), (1401, 15281), (2183, 9807), (3269, 6549)]