20404760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{811}}^1$

素因数の和:876

約数の個数: 64

約数和(自身を含む): 49986720

約数和(自身を除く): 29581960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 68, 74, 85, 136, 148, 170, 185, 296, 340, 370, 629, 680, 740, 811, 1258, 1480, 1622, 2516, 3145, 3244, 4055, 5032, 6290, 6488, 8110, 12580, 13787, 16220, 25160, 27574, 30007, 32440, 55148, 60014, 68935, 110296, 120028, 137870, 150035, 240056, 275740, 300070, 510119, 551480, 600140, 1020238, 1200280, 2040476, 2550595, 4080952, 5101190, 10202380, 20404760]

約数ペア:

[(1, 20404760), (2, 10202380), (4, 5101190), (5, 4080952), (8, 2550595), (10, 2040476), (17, 1200280), (20, 1020238), (34, 600140), (37, 551480), (40, 510119), (68, 300070), (74, 275740), (85, 240056), (136, 150035), (148, 137870), (170, 120028), (185, 110296), (296, 68935), (340, 60014), (370, 55148), (629, 32440), (680, 30007), (740, 27574), (811, 25160), (1258, 16220), (1480, 13787), (1622, 12580), (2516, 8110), (3145, 6488), (3244, 6290), (4055, 5032)]