20485400

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7879}}^1$

素因数の和:7908

約数の個数: 48

約数和(自身を含む): 51298800

約数和(自身を除く): 30813400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7879, 15758, 31516, 39395, 63032, 78790, 102427, 157580, 196975, 204854, 315160, 393950, 409708, 512135, 787900, 819416, 1024270, 1575800, 2048540, 2560675, 4097080, 5121350, 10242700, 20485400]

約数ペア:

[(1, 20485400), (2, 10242700), (4, 5121350), (5, 4097080), (8, 2560675), (10, 2048540), (13, 1575800), (20, 1024270), (25, 819416), (26, 787900), (40, 512135), (50, 409708), (52, 393950), (65, 315160), (100, 204854), (104, 196975), (130, 157580), (200, 102427), (260, 78790), (325, 63032), (520, 39395), (650, 31516), (1300, 15758), (2600, 7879)]