81890120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{167}}^1$

素因数の和:255

約数の個数: 128

約数和(自身を含む): 213373440

約数和(自身を除く): 131483320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 41, 46, 52, 65, 82, 92, 104, 115, 130, 164, 167, 184, 205, 230, 260, 299, 328, 334, 410, 460, 520, 533, 598, 668, 820, 835, 920, 943, 1066, 1196, 1336, 1495, 1640, 1670, 1886, 2132, 2171, 2392, 2665, 2990, 3340, 3772, 3841, 4264, 4342, 4715, 5330, 5980, 6680, 6847, 7544, 7682, 8684, 9430, 10660, 10855, 11960, 12259, 13694, 15364, 17368, 18860, 19205, 21320, 21710, 24518, 27388, 30728, 34235, 37720, 38410, 43420, 49036, 49933, 54776, 61295, 68470, 76820, 86840, 89011, 98072, 99866, 122590, 136940, 153640, 157481, 178022, 199732, 245180, 249665, 273880, 314962, 356044, 399464, 445055, 490360, 499330, 629924, 712088, 787405, 890110, 998660, 1259848, 1574810, 1780220, 1997320, 2047253, 3149620, 3560440, 4094506, 6299240, 8189012, 10236265, 16378024, 20472530, 40945060, 81890120]

約数ペア:

[(1, 81890120), (2, 40945060), (4, 20472530), (5, 16378024), (8, 10236265), (10, 8189012), (13, 6299240), (20, 4094506), (23, 3560440), (26, 3149620), (40, 2047253), (41, 1997320), (46, 1780220), (52, 1574810), (65, 1259848), (82, 998660), (92, 890110), (104, 787405), (115, 712088), (130, 629924), (164, 499330), (167, 490360), (184, 445055), (205, 399464), (230, 356044), (260, 314962), (299, 273880), (328, 249665), (334, 245180), (410, 199732), (460, 178022), (520, 157481), (533, 153640), (598, 136940), (668, 122590), (820, 99866), (835, 98072), (920, 89011), (943, 86840), (1066, 76820), (1196, 68470), (1336, 61295), (1495, 54776), (1640, 49933), (1670, 49036), (1886, 43420), (2132, 38410), (2171, 37720), (2392, 34235), (2665, 30728), (2990, 27388), (3340, 24518), (3772, 21710), (3841, 21320), (4264, 19205), (4342, 18860), (4715, 17368), (5330, 15364), (5980, 13694), (6680, 12259), (6847, 11960), (7544, 10855), (7682, 10660), (8684, 9430)]