19900072

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{137}}^1\times {\mathrm{271}}^1$

素因数の和:481

約数の個数: 32

約数和(自身を含む): 38286720

約数和(自身を除く): 18386648

約数列:

[1, 2, 4, 8, 67, 134, 137, 268, 271, 274, 536, 542, 548, 1084, 1096, 2168, 9179, 18157, 18358, 36314, 36716, 37127, 72628, 73432, 74254, 145256, 148508, 297016, 2487509, 4975018, 9950036, 19900072]

約数ペア:

[(1, 19900072), (2, 9950036), (4, 4975018), (8, 2487509), (67, 297016), (134, 148508), (137, 145256), (268, 74254), (271, 73432), (274, 72628), (536, 37127), (542, 36716), (548, 36314), (1084, 18358), (1096, 18157), (2168, 9179)]