28490007

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1321}}^1$

素因数の和:1423

約数の個数: 32

約数和(自身を含む): 47380480

約数和(自身を除く): 18890473

約数列:

[1, 3, 7, 13, 21, 39, 79, 91, 237, 273, 553, 1027, 1321, 1659, 3081, 3963, 7189, 9247, 17173, 21567, 27741, 51519, 104359, 120211, 313077, 360633, 730513, 1356667, 2191539, 4070001, 9496669, 28490007]

約数ペア:

[(1, 28490007), (3, 9496669), (7, 4070001), (13, 2191539), (21, 1356667), (39, 730513), (79, 360633), (91, 313077), (237, 120211), (273, 104359), (553, 51519), (1027, 27741), (1321, 21567), (1659, 17173), (3081, 9247), (3963, 7189)]