27881980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1237}}^1$

素因数の和:1283

約数の個数: 72

約数和(自身を含む): 71130528

約数和(自身を除く): 43248548

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 980, 1127, 1237, 1610, 2254, 2474, 3220, 4508, 4948, 5635, 6185, 8659, 11270, 12370, 17318, 22540, 24740, 28451, 34636, 43295, 56902, 60613, 86590, 113804, 121226, 142255, 173180, 199157, 242452, 284510, 303065, 398314, 569020, 606130, 796628, 995785, 1212260, 1394099, 1991570, 2788198, 3983140, 5576396, 6970495, 13940990, 27881980]

約数ペア:

[(1, 27881980), (2, 13940990), (4, 6970495), (5, 5576396), (7, 3983140), (10, 2788198), (14, 1991570), (20, 1394099), (23, 1212260), (28, 995785), (35, 796628), (46, 606130), (49, 569020), (70, 398314), (92, 303065), (98, 284510), (115, 242452), (140, 199157), (161, 173180), (196, 142255), (230, 121226), (245, 113804), (322, 86590), (460, 60613), (490, 56902), (644, 43295), (805, 34636), (980, 28451), (1127, 24740), (1237, 22540), (1610, 17318), (2254, 12370), (2474, 11270), (3220, 8659), (4508, 6185), (4948, 5635)]