21998613

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1321}}^1$

素因数の和:1405

約数の個数: 32

約数和(自身を含む): 36719872

約数和(自身を除く): 14721259

約数列:

[1, 3, 7, 13, 21, 39, 61, 91, 183, 273, 427, 793, 1281, 1321, 2379, 3963, 5551, 9247, 16653, 17173, 27741, 51519, 80581, 120211, 241743, 360633, 564067, 1047553, 1692201, 3142659, 7332871, 21998613]

約数ペア:

[(1, 21998613), (3, 7332871), (7, 3142659), (13, 1692201), (21, 1047553), (39, 564067), (61, 360633), (91, 241743), (183, 120211), (273, 80581), (427, 51519), (793, 27741), (1281, 17173), (1321, 16653), (2379, 9247), (3963, 5551)]