28077880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{263}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 67573440

約数和(自身を除く): 39495560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 157, 170, 263, 314, 340, 526, 628, 680, 785, 1052, 1256, 1315, 1570, 2104, 2630, 2669, 3140, 4471, 5260, 5338, 6280, 8942, 10520, 10676, 13345, 17884, 21352, 22355, 26690, 35768, 41291, 44710, 53380, 82582, 89420, 106760, 165164, 178840, 206455, 330328, 412910, 701947, 825820, 1403894, 1651640, 2807788, 3509735, 5615576, 7019470, 14038940, 28077880]

約数ペア:

[(1, 28077880), (2, 14038940), (4, 7019470), (5, 5615576), (8, 3509735), (10, 2807788), (17, 1651640), (20, 1403894), (34, 825820), (40, 701947), (68, 412910), (85, 330328), (136, 206455), (157, 178840), (170, 165164), (263, 106760), (314, 89420), (340, 82582), (526, 53380), (628, 44710), (680, 41291), (785, 35768), (1052, 26690), (1256, 22355), (1315, 21352), (1570, 17884), (2104, 13345), (2630, 10676), (2669, 10520), (3140, 8942), (4471, 6280), (5260, 5338)]