157728920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1\times {\mathrm{509}}^1$

素因数の和:708

約数の個数: 64

約数和(自身を含む): 364262400

約数和(自身を除く): 206533480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 127, 244, 254, 305, 488, 508, 509, 610, 635, 1016, 1018, 1220, 1270, 2036, 2440, 2540, 2545, 4072, 5080, 5090, 7747, 10180, 15494, 20360, 30988, 31049, 38735, 61976, 62098, 64643, 77470, 124196, 129286, 154940, 155245, 248392, 258572, 309880, 310490, 323215, 517144, 620980, 646430, 1241960, 1292860, 2585720, 3943223, 7886446, 15772892, 19716115, 31545784, 39432230, 78864460, 157728920]

約数ペア:

[(1, 157728920), (2, 78864460), (4, 39432230), (5, 31545784), (8, 19716115), (10, 15772892), (20, 7886446), (40, 3943223), (61, 2585720), (122, 1292860), (127, 1241960), (244, 646430), (254, 620980), (305, 517144), (488, 323215), (508, 310490), (509, 309880), (610, 258572), (635, 248392), (1016, 155245), (1018, 154940), (1220, 129286), (1270, 124196), (2036, 77470), (2440, 64643), (2540, 62098), (2545, 61976), (4072, 38735), (5080, 31049), (5090, 30988), (7747, 20360), (10180, 15494)]