20639060

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{487}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 47058816

約数和(自身を除く): 26419756

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 163, 260, 326, 487, 652, 815, 974, 1630, 1948, 2119, 2435, 3260, 4238, 4870, 6331, 8476, 9740, 10595, 12662, 21190, 25324, 31655, 42380, 63310, 79381, 126620, 158762, 317524, 396905, 793810, 1031953, 1587620, 2063906, 4127812, 5159765, 10319530, 20639060]

約数ペア:

[(1, 20639060), (2, 10319530), (4, 5159765), (5, 4127812), (10, 2063906), (13, 1587620), (20, 1031953), (26, 793810), (52, 396905), (65, 317524), (130, 158762), (163, 126620), (260, 79381), (326, 63310), (487, 42380), (652, 31655), (815, 25324), (974, 21190), (1630, 12662), (1948, 10595), (2119, 9740), (2435, 8476), (3260, 6331), (4238, 4870)]