21139937260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2622821}}^1$

素因数の和:2622874

約数の個数: 48

約数和(自身を含む): 49351018752

約数和(自身を除く): 28211081492

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 4030, 8060, 2622821, 5245642, 10491284, 13114105, 26228210, 34096673, 52456420, 68193346, 81307451, 136386692, 162614902, 170483365, 325229804, 340966730, 406537255, 681933460, 813074510, 1056996863, 1626149020, 2113993726, 4227987452, 5284984315, 10569968630, 21139937260]

約数ペア:

[(1, 21139937260), (2, 10569968630), (4, 5284984315), (5, 4227987452), (10, 2113993726), (13, 1626149020), (20, 1056996863), (26, 813074510), (31, 681933460), (52, 406537255), (62, 340966730), (65, 325229804), (124, 170483365), (130, 162614902), (155, 136386692), (260, 81307451), (310, 68193346), (403, 52456420), (620, 34096673), (806, 26228210), (1612, 13114105), (2015, 10491284), (4030, 5245642), (8060, 2622821)]