131449720

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{20161}}^1$

素因数の和:20335

約数の個数: 32

約数和(自身を含む): 297591120

約数和(自身を除く): 166141400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 20161, 40322, 80644, 100805, 161288, 201610, 403220, 806440, 3286243, 6572486, 13144972, 16431215, 26289944, 32862430, 65724860, 131449720]

約数ペア:

[(1, 131449720), (2, 65724860), (4, 32862430), (5, 26289944), (8, 16431215), (10, 13144972), (20, 6572486), (40, 3286243), (163, 806440), (326, 403220), (652, 201610), (815, 161288), (1304, 100805), (1630, 80644), (3260, 40322), (6520, 20161)]