1640787280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{26261}}^1$

素因数の和:26356

約数の個数: 80

約数和(自身を含む): 4220408448

約数和(自身を除く): 2579621168

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 71, 80, 88, 110, 142, 176, 220, 284, 355, 440, 568, 710, 781, 880, 1136, 1420, 1562, 2840, 3124, 3905, 5680, 6248, 7810, 12496, 15620, 26261, 31240, 52522, 62480, 105044, 131305, 210088, 262610, 288871, 420176, 525220, 577742, 1050440, 1155484, 1444355, 1864531, 2100880, 2310968, 2888710, 3729062, 4621936, 5777420, 7458124, 9322655, 11554840, 14916248, 18645310, 20509841, 23109680, 29832496, 37290620, 41019682, 74581240, 82039364, 102549205, 149162480, 164078728, 205098410, 328157456, 410196820, 820393640, 1640787280]

約数ペア:

[(1, 1640787280), (2, 820393640), (4, 410196820), (5, 328157456), (8, 205098410), (10, 164078728), (11, 149162480), (16, 102549205), (20, 82039364), (22, 74581240), (40, 41019682), (44, 37290620), (55, 29832496), (71, 23109680), (80, 20509841), (88, 18645310), (110, 14916248), (142, 11554840), (176, 9322655), (220, 7458124), (284, 5777420), (355, 4621936), (440, 3729062), (568, 2888710), (710, 2310968), (781, 2100880), (880, 1864531), (1136, 1444355), (1420, 1155484), (1562, 1050440), (2840, 577742), (3124, 525220), (3905, 420176), (5680, 288871), (6248, 262610), (7810, 210088), (12496, 131305), (15620, 105044), (26261, 62480), (31240, 52522)]