290431720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{20113}}^1$

素因数の和:20162

約数の個数: 48

約数和(自身を含む): 689709060

約数和(自身を除く): 399277340

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 361, 380, 722, 760, 1444, 1805, 2888, 3610, 7220, 14440, 20113, 40226, 80452, 100565, 160904, 201130, 382147, 402260, 764294, 804520, 1528588, 1910735, 3057176, 3821470, 7260793, 7642940, 14521586, 15285880, 29043172, 36303965, 58086344, 72607930, 145215860, 290431720]

約数ペア:

[(1, 290431720), (2, 145215860), (4, 72607930), (5, 58086344), (8, 36303965), (10, 29043172), (19, 15285880), (20, 14521586), (38, 7642940), (40, 7260793), (76, 3821470), (95, 3057176), (152, 1910735), (190, 1528588), (361, 804520), (380, 764294), (722, 402260), (760, 382147), (1444, 201130), (1805, 160904), (2888, 100565), (3610, 80452), (7220, 40226), (14440, 20113)]