21282280

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{683}}^1$

素因数の和:754

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 30428120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 41, 76, 82, 95, 152, 164, 190, 205, 328, 380, 410, 683, 760, 779, 820, 1366, 1558, 1640, 2732, 3116, 3415, 3895, 5464, 6232, 6830, 7790, 12977, 13660, 15580, 25954, 27320, 28003, 31160, 51908, 56006, 64885, 103816, 112012, 129770, 140015, 224024, 259540, 280030, 519080, 532057, 560060, 1064114, 1120120, 2128228, 2660285, 4256456, 5320570, 10641140, 21282280]

約数ペア:

[(1, 21282280), (2, 10641140), (4, 5320570), (5, 4256456), (8, 2660285), (10, 2128228), (19, 1120120), (20, 1064114), (38, 560060), (40, 532057), (41, 519080), (76, 280030), (82, 259540), (95, 224024), (152, 140015), (164, 129770), (190, 112012), (205, 103816), (328, 64885), (380, 56006), (410, 51908), (683, 31160), (760, 28003), (779, 27320), (820, 25954), (1366, 15580), (1558, 13660), (1640, 12977), (2732, 7790), (3116, 6830), (3415, 6232), (3895, 5464)]