1287004940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{25127}}^1$

素因数の和:25346

約数の個数: 48

約数和(自身を含む): 2925502272

約数和(自身を除く): 1638497332

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 197, 260, 394, 788, 985, 1970, 2561, 3940, 5122, 10244, 12805, 25127, 25610, 50254, 51220, 100508, 125635, 251270, 326651, 502540, 653302, 1306604, 1633255, 3266510, 4950019, 6533020, 9900038, 19800076, 24750095, 49500190, 64350247, 99000380, 128700494, 257400988, 321751235, 643502470, 1287004940]

約数ペア:

[(1, 1287004940), (2, 643502470), (4, 321751235), (5, 257400988), (10, 128700494), (13, 99000380), (20, 64350247), (26, 49500190), (52, 24750095), (65, 19800076), (130, 9900038), (197, 6533020), (260, 4950019), (394, 3266510), (788, 1633255), (985, 1306604), (1970, 653302), (2561, 502540), (3940, 326651), (5122, 251270), (10244, 125635), (12805, 100508), (25127, 51220), (25610, 50254)]