18203620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{347}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 39872448

約数和(自身を除く): 21668828

約数列:

[1, 2, 4, 5, 10, 20, 43, 61, 86, 122, 172, 215, 244, 305, 347, 430, 610, 694, 860, 1220, 1388, 1735, 2623, 3470, 5246, 6940, 10492, 13115, 14921, 21167, 26230, 29842, 42334, 52460, 59684, 74605, 84668, 105835, 149210, 211670, 298420, 423340, 910181, 1820362, 3640724, 4550905, 9101810, 18203620]

約数ペア:

[(1, 18203620), (2, 9101810), (4, 4550905), (5, 3640724), (10, 1820362), (20, 910181), (43, 423340), (61, 298420), (86, 211670), (122, 149210), (172, 105835), (215, 84668), (244, 74605), (305, 59684), (347, 52460), (430, 42334), (610, 29842), (694, 26230), (860, 21167), (1220, 14921), (1388, 13115), (1735, 10492), (2623, 6940), (3470, 5246)]