18931960

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7759}}^1$

素因数の和:7831

約数の個数: 32

約数和(自身を含む): 43300800

約数和(自身を除く): 24368840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7759, 15518, 31036, 38795, 62072, 77590, 155180, 310360, 473299, 946598, 1893196, 2366495, 3786392, 4732990, 9465980, 18931960]

約数ペア:

[(1, 18931960), (2, 9465980), (4, 4732990), (5, 3786392), (8, 2366495), (10, 1893196), (20, 946598), (40, 473299), (61, 310360), (122, 155180), (244, 77590), (305, 62072), (488, 38795), (610, 31036), (1220, 15518), (2440, 7759)]