20839700

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{4253}}^1$

素因数の和:4281

約数の個数: 54

約数和(自身を含む): 52617726

約数和(自身を除く): 31778026

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 140, 175, 196, 245, 350, 490, 700, 980, 1225, 2450, 4253, 4900, 8506, 17012, 21265, 29771, 42530, 59542, 85060, 106325, 119084, 148855, 208397, 212650, 297710, 416794, 425300, 595420, 744275, 833588, 1041985, 1488550, 2083970, 2977100, 4167940, 5209925, 10419850, 20839700]

約数ペア:

[(1, 20839700), (2, 10419850), (4, 5209925), (5, 4167940), (7, 2977100), (10, 2083970), (14, 1488550), (20, 1041985), (25, 833588), (28, 744275), (35, 595420), (49, 425300), (50, 416794), (70, 297710), (98, 212650), (100, 208397), (140, 148855), (175, 119084), (196, 106325), (245, 85060), (350, 59542), (490, 42530), (700, 29771), (980, 21265), (1225, 17012), (2450, 8506), (4253, 4900)]