20868900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{5351}}^1$

素因数の和:5381

約数の個数: 72

約数和(自身を含む): 65037504

約数和(自身を除く): 44168604

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 25, 26, 30, 39, 50, 52, 60, 65, 75, 78, 100, 130, 150, 156, 195, 260, 300, 325, 390, 650, 780, 975, 1300, 1950, 3900, 5351, 10702, 16053, 21404, 26755, 32106, 53510, 64212, 69563, 80265, 107020, 133775, 139126, 160530, 208689, 267550, 278252, 321060, 347815, 401325, 417378, 535100, 695630, 802650, 834756, 1043445, 1391260, 1605300, 1739075, 2086890, 3478150, 4173780, 5217225, 6956300, 10434450, 20868900]

約数ペア:

[(1, 20868900), (2, 10434450), (3, 6956300), (4, 5217225), (5, 4173780), (6, 3478150), (10, 2086890), (12, 1739075), (13, 1605300), (15, 1391260), (20, 1043445), (25, 834756), (26, 802650), (30, 695630), (39, 535100), (50, 417378), (52, 401325), (60, 347815), (65, 321060), (75, 278252), (78, 267550), (100, 208689), (130, 160530), (150, 139126), (156, 133775), (195, 107020), (260, 80265), (300, 69563), (325, 64212), (390, 53510), (650, 32106), (780, 26755), (975, 21404), (1300, 16053), (1950, 10702), (3900, 5351)]