8390780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 18869760

約数和(自身を除く): 10478980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 311, 355, 380, 622, 710, 1244, 1349, 1420, 1555, 2698, 3110, 5396, 5909, 6220, 6745, 11818, 13490, 22081, 23636, 26980, 29545, 44162, 59090, 88324, 110405, 118180, 220810, 419539, 441620, 839078, 1678156, 2097695, 4195390, 8390780]

約数ペア:

[(1, 8390780), (2, 4195390), (4, 2097695), (5, 1678156), (10, 839078), (19, 441620), (20, 419539), (38, 220810), (71, 118180), (76, 110405), (95, 88324), (142, 59090), (190, 44162), (284, 29545), (311, 26980), (355, 23636), (380, 22081), (622, 13490), (710, 11818), (1244, 6745), (1349, 6220), (1420, 5909), (1555, 5396), (2698, 3110)]