18212720

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2347}}^1$

素因数の和:2457

約数の個数: 40

約数和(自身を含む): 42799344

約数和(自身を除く): 24586624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2347, 3880, 4694, 7760, 9388, 11735, 18776, 23470, 37552, 46940, 93880, 187760, 227659, 455318, 910636, 1138295, 1821272, 2276590, 3642544, 4553180, 9106360, 18212720]

約数ペア:

[(1, 18212720), (2, 9106360), (4, 4553180), (5, 3642544), (8, 2276590), (10, 1821272), (16, 1138295), (20, 910636), (40, 455318), (80, 227659), (97, 187760), (194, 93880), (388, 46940), (485, 37552), (776, 23470), (970, 18776), (1552, 11735), (1940, 9388), (2347, 7760), (3880, 4694)]