39981420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{571}}^1$

素因数の和:975

約数の個数: 72

約数和(自身を含む): 121801680

約数和(自身を除く): 81820260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 389, 571, 778, 1142, 1167, 1556, 1713, 1945, 2284, 2334, 2855, 3426, 3501, 3890, 4668, 5139, 5710, 5835, 6852, 7002, 7780, 8565, 10278, 11420, 11670, 14004, 17130, 17505, 20556, 23340, 25695, 34260, 35010, 51390, 70020, 102780, 222119, 444238, 666357, 888476, 1110595, 1332714, 1999071, 2221190, 2665428, 3331785, 3998142, 4442380, 6663570, 7996284, 9995355, 13327140, 19990710, 39981420]

約数ペア:

[(1, 39981420), (2, 19990710), (3, 13327140), (4, 9995355), (5, 7996284), (6, 6663570), (9, 4442380), (10, 3998142), (12, 3331785), (15, 2665428), (18, 2221190), (20, 1999071), (30, 1332714), (36, 1110595), (45, 888476), (60, 666357), (90, 444238), (180, 222119), (389, 102780), (571, 70020), (778, 51390), (1142, 35010), (1167, 34260), (1556, 25695), (1713, 23340), (1945, 20556), (2284, 17505), (2334, 17130), (2855, 14004), (3426, 11670), (3501, 11420), (3890, 10278), (4668, 8565), (5139, 7780), (5710, 7002), (5835, 6852)]