18517850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{919}}^1$

素因数の和:975

約数の個数: 48

約数和(自身を含む): 38330880

約数和(自身を除く): 19813030

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 130, 155, 310, 325, 403, 650, 775, 806, 919, 1550, 1838, 2015, 4030, 4595, 9190, 10075, 11947, 20150, 22975, 23894, 28489, 45950, 56978, 59735, 119470, 142445, 284890, 298675, 370357, 597350, 712225, 740714, 1424450, 1851785, 3703570, 9258925, 18517850]

約数ペア:

[(1, 18517850), (2, 9258925), (5, 3703570), (10, 1851785), (13, 1424450), (25, 740714), (26, 712225), (31, 597350), (50, 370357), (62, 298675), (65, 284890), (130, 142445), (155, 119470), (310, 59735), (325, 56978), (403, 45950), (650, 28489), (775, 23894), (806, 22975), (919, 20150), (1550, 11947), (1838, 10075), (2015, 9190), (4030, 4595)]