20746720

素因数分解:

$2^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1021}}^1$

素因数の和:1163

約数の個数: 48

約数和(自身を含む): 49448448

約数和(自身を除く): 28701728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 508, 635, 1016, 1021, 1270, 2032, 2042, 2540, 4064, 4084, 5080, 5105, 8168, 10160, 10210, 16336, 20320, 20420, 32672, 40840, 81680, 129667, 163360, 259334, 518668, 648335, 1037336, 1296670, 2074672, 2593340, 4149344, 5186680, 10373360, 20746720]

約数ペア:

[(1, 20746720), (2, 10373360), (4, 5186680), (5, 4149344), (8, 2593340), (10, 2074672), (16, 1296670), (20, 1037336), (32, 648335), (40, 518668), (80, 259334), (127, 163360), (160, 129667), (254, 81680), (508, 40840), (635, 32672), (1016, 20420), (1021, 20320), (1270, 16336), (2032, 10210), (2042, 10160), (2540, 8168), (4064, 5105), (4084, 5080)]