2891980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{227}}^1$

素因数の和:263

約数の個数: 72

約数和(自身を含む): 7641648

約数和(自身を除く): 4749668

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 227, 245, 260, 364, 454, 455, 490, 637, 908, 910, 980, 1135, 1274, 1589, 1820, 2270, 2548, 2951, 3178, 3185, 4540, 5902, 6356, 6370, 7945, 11123, 11804, 12740, 14755, 15890, 20657, 22246, 29510, 31780, 41314, 44492, 55615, 59020, 82628, 103285, 111230, 144599, 206570, 222460, 289198, 413140, 578396, 722995, 1445990, 2891980]

約数ペア:

[(1, 2891980), (2, 1445990), (4, 722995), (5, 578396), (7, 413140), (10, 289198), (13, 222460), (14, 206570), (20, 144599), (26, 111230), (28, 103285), (35, 82628), (49, 59020), (52, 55615), (65, 44492), (70, 41314), (91, 31780), (98, 29510), (130, 22246), (140, 20657), (182, 15890), (196, 14755), (227, 12740), (245, 11804), (260, 11123), (364, 7945), (454, 6370), (455, 6356), (490, 5902), (637, 4540), (908, 3185), (910, 3178), (980, 2951), (1135, 2548), (1274, 2270), (1589, 1820)]