20738480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1277}}^1$

素因数の和:1326

約数の個数: 80

約数和(自身を含む): 57049920

約数和(自身を除く): 36311440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 56, 58, 70, 80, 112, 116, 140, 145, 203, 232, 280, 290, 406, 464, 560, 580, 812, 1015, 1160, 1277, 1624, 2030, 2320, 2554, 3248, 4060, 5108, 6385, 8120, 8939, 10216, 12770, 16240, 17878, 20432, 25540, 35756, 37033, 44695, 51080, 71512, 74066, 89390, 102160, 143024, 148132, 178780, 185165, 259231, 296264, 357560, 370330, 518462, 592528, 715120, 740660, 1036924, 1296155, 1481320, 2073848, 2592310, 2962640, 4147696, 5184620, 10369240, 20738480]

約数ペア:

[(1, 20738480), (2, 10369240), (4, 5184620), (5, 4147696), (7, 2962640), (8, 2592310), (10, 2073848), (14, 1481320), (16, 1296155), (20, 1036924), (28, 740660), (29, 715120), (35, 592528), (40, 518462), (56, 370330), (58, 357560), (70, 296264), (80, 259231), (112, 185165), (116, 178780), (140, 148132), (145, 143024), (203, 102160), (232, 89390), (280, 74066), (290, 71512), (406, 51080), (464, 44695), (560, 37033), (580, 35756), (812, 25540), (1015, 20432), (1160, 17878), (1277, 16240), (1624, 12770), (2030, 10216), (2320, 8939), (2554, 8120), (3248, 6385), (4060, 5108)]