1645780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 3749760

約数和(自身を除く): 2103980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 71, 76, 95, 122, 142, 190, 244, 284, 305, 355, 380, 610, 710, 1159, 1220, 1349, 1420, 2318, 2698, 4331, 4636, 5396, 5795, 6745, 8662, 11590, 13490, 17324, 21655, 23180, 26980, 43310, 82289, 86620, 164578, 329156, 411445, 822890, 1645780]

約数ペア:

[(1, 1645780), (2, 822890), (4, 411445), (5, 329156), (10, 164578), (19, 86620), (20, 82289), (38, 43310), (61, 26980), (71, 23180), (76, 21655), (95, 17324), (122, 13490), (142, 11590), (190, 8662), (244, 6745), (284, 5795), (305, 5396), (355, 4636), (380, 4331), (610, 2698), (710, 2318), (1159, 1420), (1220, 1349)]