19990360

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1039}}^1$

素因数の和:1100

約数の個数: 64

約数和(自身を含む): 49795200

約数和(自身を除く): 29804840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 104, 130, 148, 185, 260, 296, 370, 481, 520, 740, 962, 1039, 1480, 1924, 2078, 2405, 3848, 4156, 4810, 5195, 8312, 9620, 10390, 13507, 19240, 20780, 27014, 38443, 41560, 54028, 67535, 76886, 108056, 135070, 153772, 192215, 270140, 307544, 384430, 499759, 540280, 768860, 999518, 1537720, 1999036, 2498795, 3998072, 4997590, 9995180, 19990360]

約数ペア:

[(1, 19990360), (2, 9995180), (4, 4997590), (5, 3998072), (8, 2498795), (10, 1999036), (13, 1537720), (20, 999518), (26, 768860), (37, 540280), (40, 499759), (52, 384430), (65, 307544), (74, 270140), (104, 192215), (130, 153772), (148, 135070), (185, 108056), (260, 76886), (296, 67535), (370, 54028), (481, 41560), (520, 38443), (740, 27014), (962, 20780), (1039, 19240), (1480, 13507), (1924, 10390), (2078, 9620), (2405, 8312), (3848, 5195), (4156, 4810)]