18420890

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1\times {\mathrm{251}}^1$

素因数の和:478

約数の個数: 32

約数和(自身を含む): 34292160

約数和(自身を除く): 15871270

約数列:

[1, 2, 5, 10, 41, 82, 179, 205, 251, 358, 410, 502, 895, 1255, 1790, 2510, 7339, 10291, 14678, 20582, 36695, 44929, 51455, 73390, 89858, 102910, 224645, 449290, 1842089, 3684178, 9210445, 18420890]

約数ペア:

[(1, 18420890), (2, 9210445), (5, 3684178), (10, 1842089), (41, 449290), (82, 224645), (179, 102910), (205, 89858), (251, 73390), (358, 51455), (410, 44929), (502, 36695), (895, 20582), (1255, 14678), (1790, 10291), (2510, 7339)]