19991280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2687}}^1$

素因数の和:2734

約数の個数: 80

約数和(自身を含む): 63995904

約数和(自身を除く): 44004624

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31, 40, 48, 60, 62, 80, 93, 120, 124, 155, 186, 240, 248, 310, 372, 465, 496, 620, 744, 930, 1240, 1488, 1860, 2480, 2687, 3720, 5374, 7440, 8061, 10748, 13435, 16122, 21496, 26870, 32244, 40305, 42992, 53740, 64488, 80610, 83297, 107480, 128976, 161220, 166594, 214960, 249891, 322440, 333188, 416485, 499782, 644880, 666376, 832970, 999564, 1249455, 1332752, 1665940, 1999128, 2498910, 3331880, 3998256, 4997820, 6663760, 9995640, 19991280]

約数ペア:

[(1, 19991280), (2, 9995640), (3, 6663760), (4, 4997820), (5, 3998256), (6, 3331880), (8, 2498910), (10, 1999128), (12, 1665940), (15, 1332752), (16, 1249455), (20, 999564), (24, 832970), (30, 666376), (31, 644880), (40, 499782), (48, 416485), (60, 333188), (62, 322440), (80, 249891), (93, 214960), (120, 166594), (124, 161220), (155, 128976), (186, 107480), (240, 83297), (248, 80610), (310, 64488), (372, 53740), (465, 42992), (496, 40305), (620, 32244), (744, 26870), (930, 21496), (1240, 16122), (1488, 13435), (1860, 10748), (2480, 8061), (2687, 7440), (3720, 5374)]