19991100

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{1801}}^1$

素因数の和:1855

約数の個数: 72

約数和(自身を含む): 59437168

約数和(自身を除く): 39446068

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 37, 50, 60, 74, 75, 100, 111, 148, 150, 185, 222, 300, 370, 444, 555, 740, 925, 1110, 1801, 1850, 2220, 2775, 3602, 3700, 5403, 5550, 7204, 9005, 10806, 11100, 18010, 21612, 27015, 36020, 45025, 54030, 66637, 90050, 108060, 133274, 135075, 180100, 199911, 266548, 270150, 333185, 399822, 540300, 666370, 799644, 999555, 1332740, 1665925, 1999110, 3331850, 3998220, 4997775, 6663700, 9995550, 19991100]

約数ペア:

[(1, 19991100), (2, 9995550), (3, 6663700), (4, 4997775), (5, 3998220), (6, 3331850), (10, 1999110), (12, 1665925), (15, 1332740), (20, 999555), (25, 799644), (30, 666370), (37, 540300), (50, 399822), (60, 333185), (74, 270150), (75, 266548), (100, 199911), (111, 180100), (148, 135075), (150, 133274), (185, 108060), (222, 90050), (300, 66637), (370, 54030), (444, 45025), (555, 36020), (740, 27015), (925, 21612), (1110, 18010), (1801, 11100), (1850, 10806), (2220, 9005), (2775, 7204), (3602, 5550), (3700, 5403)]