20764240

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5297}}^1$

素因数の和:5324

約数の個数: 60

約数和(自身を含む): 56169396

約数和(自身を除く): 35405156

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5297, 10594, 21188, 26485, 37079, 42376, 52970, 74158, 84752, 105940, 148316, 185395, 211880, 259553, 296632, 370790, 423760, 519106, 593264, 741580, 1038212, 1297765, 1483160, 2076424, 2595530, 2966320, 4152848, 5191060, 10382120, 20764240]

約数ペア:

[(1, 20764240), (2, 10382120), (4, 5191060), (5, 4152848), (7, 2966320), (8, 2595530), (10, 2076424), (14, 1483160), (16, 1297765), (20, 1038212), (28, 741580), (35, 593264), (40, 519106), (49, 423760), (56, 370790), (70, 296632), (80, 259553), (98, 211880), (112, 185395), (140, 148316), (196, 105940), (245, 84752), (280, 74158), (392, 52970), (490, 42376), (560, 37079), (784, 26485), (980, 21188), (1960, 10594), (3920, 5297)]