640788120

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{254281}}^1$

素因数の和:254305

約数の個数: 96

約数和(自身を含む): 2380079520

約数和(自身を除く): 1739291400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 56, 60, 63, 70, 72, 84, 90, 105, 120, 126, 140, 168, 180, 210, 252, 280, 315, 360, 420, 504, 630, 840, 1260, 2520, 254281, 508562, 762843, 1017124, 1271405, 1525686, 1779967, 2034248, 2288529, 2542810, 3051372, 3559934, 3814215, 4577058, 5085620, 5339901, 6102744, 7119868, 7628430, 8899835, 9154116, 10171240, 10679802, 11442645, 14239736, 15256860, 16019703, 17799670, 18308232, 21359604, 22885290, 26699505, 30513720, 32039406, 35599340, 42719208, 45770580, 53399010, 64078812, 71198680, 80098515, 91541160, 106798020, 128157624, 160197030, 213596040, 320394060, 640788120]

約数ペア:

[(1, 640788120), (2, 320394060), (3, 213596040), (4, 160197030), (5, 128157624), (6, 106798020), (7, 91541160), (8, 80098515), (9, 71198680), (10, 64078812), (12, 53399010), (14, 45770580), (15, 42719208), (18, 35599340), (20, 32039406), (21, 30513720), (24, 26699505), (28, 22885290), (30, 21359604), (35, 18308232), (36, 17799670), (40, 16019703), (42, 15256860), (45, 14239736), (56, 11442645), (60, 10679802), (63, 10171240), (70, 9154116), (72, 8899835), (84, 7628430), (90, 7119868), (105, 6102744), (120, 5339901), (126, 5085620), (140, 4577058), (168, 3814215), (180, 3559934), (210, 3051372), (252, 2542810), (280, 2288529), (315, 2034248), (360, 1779967), (420, 1525686), (504, 1271405), (630, 1017124), (840, 762843), (1260, 508562), (2520, 254281)]