1997899720

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{181}}^1\times {\mathrm{2579}}^1$

素因数の和:2878

約数の個数: 64

約数和(自身を含む): 4564123200

約数和(自身を除く): 2566223480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 181, 214, 362, 428, 535, 724, 856, 905, 1070, 1448, 1810, 2140, 2579, 3620, 4280, 5158, 7240, 10316, 12895, 19367, 20632, 25790, 38734, 51580, 77468, 96835, 103160, 154936, 193670, 275953, 387340, 466799, 551906, 774680, 933598, 1103812, 1379765, 1867196, 2207624, 2333995, 2759530, 3734392, 4667990, 5519060, 9335980, 11038120, 18671960, 49947493, 99894986, 199789972, 249737465, 399579944, 499474930, 998949860, 1997899720]

約数ペア:

[(1, 1997899720), (2, 998949860), (4, 499474930), (5, 399579944), (8, 249737465), (10, 199789972), (20, 99894986), (40, 49947493), (107, 18671960), (181, 11038120), (214, 9335980), (362, 5519060), (428, 4667990), (535, 3734392), (724, 2759530), (856, 2333995), (905, 2207624), (1070, 1867196), (1448, 1379765), (1810, 1103812), (2140, 933598), (2579, 774680), (3620, 551906), (4280, 466799), (5158, 387340), (7240, 275953), (10316, 193670), (12895, 154936), (19367, 103160), (20632, 96835), (25790, 77468), (38734, 51580)]