81730520

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{6173}}^1$

素因数の和:6515

約数の個数: 32

約数和(自身を含む): 184479120

約数和(自身を除く): 102748600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1655, 2648, 3310, 6173, 6620, 12346, 13240, 24692, 30865, 49384, 61730, 123460, 246920, 2043263, 4086526, 8173052, 10216315, 16346104, 20432630, 40865260, 81730520]

約数ペア:

[(1, 81730520), (2, 40865260), (4, 20432630), (5, 16346104), (8, 10216315), (10, 8173052), (20, 4086526), (40, 2043263), (331, 246920), (662, 123460), (1324, 61730), (1655, 49384), (2648, 30865), (3310, 24692), (6173, 13240), (6620, 12346)]