399319760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{499}}^1\times {\mathrm{1429}}^1$

素因数の和:1948

約数の個数: 80

約数和(自身を含む): 1063920000

約数和(自身を除く): 664600240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 499, 560, 998, 1429, 1996, 2495, 2858, 3493, 3992, 4990, 5716, 6986, 7145, 7984, 9980, 10003, 11432, 13972, 14290, 17465, 19960, 20006, 22864, 27944, 28580, 34930, 39920, 40012, 50015, 55888, 57160, 69860, 80024, 100030, 114320, 139720, 160048, 200060, 279440, 400120, 713071, 800240, 1426142, 2852284, 3565355, 4991497, 5704568, 7130710, 9982994, 11409136, 14261420, 19965988, 24957485, 28522840, 39931976, 49914970, 57045680, 79863952, 99829940, 199659880, 399319760]

約数ペア:

[(1, 399319760), (2, 199659880), (4, 99829940), (5, 79863952), (7, 57045680), (8, 49914970), (10, 39931976), (14, 28522840), (16, 24957485), (20, 19965988), (28, 14261420), (35, 11409136), (40, 9982994), (56, 7130710), (70, 5704568), (80, 4991497), (112, 3565355), (140, 2852284), (280, 1426142), (499, 800240), (560, 713071), (998, 400120), (1429, 279440), (1996, 200060), (2495, 160048), (2858, 139720), (3493, 114320), (3992, 100030), (4990, 80024), (5716, 69860), (6986, 57160), (7145, 55888), (7984, 50015), (9980, 40012), (10003, 39920), (11432, 34930), (13972, 28580), (14290, 27944), (17465, 22864), (19960, 20006)]