644074540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{2411}}^1$

素因数の和:2495

約数の個数: 72

約数和(自身を含む): 1466679312

約数和(自身を除く): 822604772

約数列:

[1, 2, 4, 5, 10, 19, 20, 37, 38, 74, 76, 95, 148, 185, 190, 361, 370, 380, 703, 722, 740, 1406, 1444, 1805, 2411, 2812, 3515, 3610, 4822, 7030, 7220, 9644, 12055, 13357, 14060, 24110, 26714, 45809, 48220, 53428, 66785, 89207, 91618, 133570, 178414, 183236, 229045, 267140, 356828, 446035, 458090, 870371, 892070, 916180, 1694933, 1740742, 1784140, 3389866, 3481484, 4351855, 6779732, 8474665, 8703710, 16949330, 17407420, 32203727, 33898660, 64407454, 128814908, 161018635, 322037270, 644074540]

約数ペア:

[(1, 644074540), (2, 322037270), (4, 161018635), (5, 128814908), (10, 64407454), (19, 33898660), (20, 32203727), (37, 17407420), (38, 16949330), (74, 8703710), (76, 8474665), (95, 6779732), (148, 4351855), (185, 3481484), (190, 3389866), (361, 1784140), (370, 1740742), (380, 1694933), (703, 916180), (722, 892070), (740, 870371), (1406, 458090), (1444, 446035), (1805, 356828), (2411, 267140), (2812, 229045), (3515, 183236), (3610, 178414), (4822, 133570), (7030, 91618), (7220, 89207), (9644, 66785), (12055, 53428), (13357, 48220), (14060, 45809), (24110, 26714)]