20717900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1741}}^1$

素因数の和:1779

約数の個数: 72

約数和(自身を含む): 54434016

約数和(自身を除く): 33716116

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 25, 28, 34, 35, 50, 68, 70, 85, 100, 119, 140, 170, 175, 238, 340, 350, 425, 476, 595, 700, 850, 1190, 1700, 1741, 2380, 2975, 3482, 5950, 6964, 8705, 11900, 12187, 17410, 24374, 29597, 34820, 43525, 48748, 59194, 60935, 87050, 118388, 121870, 147985, 174100, 207179, 243740, 295970, 304675, 414358, 591940, 609350, 739925, 828716, 1035895, 1218700, 1479850, 2071790, 2959700, 4143580, 5179475, 10358950, 20717900]

約数ペア:

[(1, 20717900), (2, 10358950), (4, 5179475), (5, 4143580), (7, 2959700), (10, 2071790), (14, 1479850), (17, 1218700), (20, 1035895), (25, 828716), (28, 739925), (34, 609350), (35, 591940), (50, 414358), (68, 304675), (70, 295970), (85, 243740), (100, 207179), (119, 174100), (140, 147985), (170, 121870), (175, 118388), (238, 87050), (340, 60935), (350, 59194), (425, 48748), (476, 43525), (595, 34820), (700, 29597), (850, 24374), (1190, 17410), (1700, 12187), (1741, 11900), (2380, 8705), (2975, 6964), (3482, 5950)]