978189980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{563}}^1\times {\mathrm{797}}^1$

素因数の和:1478

約数の個数: 48

約数和(自身を含む): 2079332640

約数和(自身を除く): 1101142660

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 563, 797, 1090, 1126, 1594, 2180, 2252, 2815, 3188, 3985, 5630, 7970, 11260, 15940, 61367, 86873, 122734, 173746, 245468, 306835, 347492, 434365, 448711, 613670, 868730, 897422, 1227340, 1737460, 1794844, 2243555, 4487110, 8974220, 48909499, 97818998, 195637996, 244547495, 489094990, 978189980]

約数ペア:

[(1, 978189980), (2, 489094990), (4, 244547495), (5, 195637996), (10, 97818998), (20, 48909499), (109, 8974220), (218, 4487110), (436, 2243555), (545, 1794844), (563, 1737460), (797, 1227340), (1090, 897422), (1126, 868730), (1594, 613670), (2180, 448711), (2252, 434365), (2815, 347492), (3188, 306835), (3985, 245468), (5630, 173746), (7970, 122734), (11260, 86873), (15940, 61367)]