21825940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{619}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 48121920

約数和(自身を除く): 26295980

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 410, 430, 619, 820, 860, 1238, 1763, 2476, 3095, 3526, 6190, 7052, 8815, 12380, 17630, 25379, 26617, 35260, 50758, 53234, 101516, 106468, 126895, 133085, 253790, 266170, 507580, 532340, 1091297, 2182594, 4365188, 5456485, 10912970, 21825940]

約数ペア:

[(1, 21825940), (2, 10912970), (4, 5456485), (5, 4365188), (10, 2182594), (20, 1091297), (41, 532340), (43, 507580), (82, 266170), (86, 253790), (164, 133085), (172, 126895), (205, 106468), (215, 101516), (410, 53234), (430, 50758), (619, 35260), (820, 26617), (860, 25379), (1238, 17630), (1763, 12380), (2476, 8815), (3095, 7052), (3526, 6190)]