19618720

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:254

約数の個数: 96

約数和(自身を含む): 51601536

約数和(自身を除く): 31982816

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 71, 80, 88, 110, 142, 157, 160, 176, 220, 284, 314, 352, 355, 440, 568, 628, 710, 781, 785, 880, 1136, 1256, 1420, 1562, 1570, 1727, 1760, 2272, 2512, 2840, 3124, 3140, 3454, 3905, 5024, 5680, 6248, 6280, 6908, 7810, 8635, 11147, 11360, 12496, 12560, 13816, 15620, 17270, 22294, 24992, 25120, 27632, 31240, 34540, 44588, 55264, 55735, 62480, 69080, 89176, 111470, 122617, 124960, 138160, 178352, 222940, 245234, 276320, 356704, 445880, 490468, 613085, 891760, 980936, 1226170, 1783520, 1961872, 2452340, 3923744, 4904680, 9809360, 19618720]

約数ペア:

[(1, 19618720), (2, 9809360), (4, 4904680), (5, 3923744), (8, 2452340), (10, 1961872), (11, 1783520), (16, 1226170), (20, 980936), (22, 891760), (32, 613085), (40, 490468), (44, 445880), (55, 356704), (71, 276320), (80, 245234), (88, 222940), (110, 178352), (142, 138160), (157, 124960), (160, 122617), (176, 111470), (220, 89176), (284, 69080), (314, 62480), (352, 55735), (355, 55264), (440, 44588), (568, 34540), (628, 31240), (710, 27632), (781, 25120), (785, 24992), (880, 22294), (1136, 17270), (1256, 15620), (1420, 13816), (1562, 12560), (1570, 12496), (1727, 11360), (1760, 11147), (2272, 8635), (2512, 7810), (2840, 6908), (3124, 6280), (3140, 6248), (3454, 5680), (3905, 5024)]