19991530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2521}}^1$

素因数の和:2602

約数の個数: 32

約数和(自身を含む): 39403728

約数和(自身を除く): 19412198

約数列:

[1, 2, 5, 10, 13, 26, 61, 65, 122, 130, 305, 610, 793, 1586, 2521, 3965, 5042, 7930, 12605, 25210, 32773, 65546, 153781, 163865, 307562, 327730, 768905, 1537810, 1999153, 3998306, 9995765, 19991530]

約数ペア:

[(1, 19991530), (2, 9995765), (5, 3998306), (10, 1999153), (13, 1537810), (26, 768905), (61, 327730), (65, 307562), (122, 163865), (130, 153781), (305, 65546), (610, 32773), (793, 25210), (1586, 12605), (2521, 7930), (3965, 5042)]