28132900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 64449000

約数和(自身を除く): 36316100

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 89, 100, 109, 116, 145, 178, 218, 290, 356, 436, 445, 545, 580, 725, 890, 1090, 1450, 1780, 2180, 2225, 2581, 2725, 2900, 3161, 4450, 5162, 5450, 6322, 8900, 9701, 10324, 10900, 12644, 12905, 15805, 19402, 25810, 31610, 38804, 48505, 51620, 63220, 64525, 79025, 97010, 129050, 158050, 194020, 242525, 258100, 281329, 316100, 485050, 562658, 970100, 1125316, 1406645, 2813290, 5626580, 7033225, 14066450, 28132900]

約数ペア:

[(1, 28132900), (2, 14066450), (4, 7033225), (5, 5626580), (10, 2813290), (20, 1406645), (25, 1125316), (29, 970100), (50, 562658), (58, 485050), (89, 316100), (100, 281329), (109, 258100), (116, 242525), (145, 194020), (178, 158050), (218, 129050), (290, 97010), (356, 79025), (436, 64525), (445, 63220), (545, 51620), (580, 48505), (725, 38804), (890, 31610), (1090, 25810), (1450, 19402), (1780, 15805), (2180, 12905), (2225, 12644), (2581, 10900), (2725, 10324), (2900, 9701), (3161, 8900), (4450, 6322), (5162, 5450)]