28991900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{499}}^1$

素因数の和:603

約数の個数: 72

約数和(自身を含む): 72912000

約数和(自身を除く): 43920100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 83, 100, 140, 166, 175, 332, 350, 415, 499, 581, 700, 830, 998, 1162, 1660, 1996, 2075, 2324, 2495, 2905, 3493, 4150, 4990, 5810, 6986, 8300, 9980, 11620, 12475, 13972, 14525, 17465, 24950, 29050, 34930, 41417, 49900, 58100, 69860, 82834, 87325, 165668, 174650, 207085, 289919, 349300, 414170, 579838, 828340, 1035425, 1159676, 1449595, 2070850, 2899190, 4141700, 5798380, 7247975, 14495950, 28991900]

約数ペア:

[(1, 28991900), (2, 14495950), (4, 7247975), (5, 5798380), (7, 4141700), (10, 2899190), (14, 2070850), (20, 1449595), (25, 1159676), (28, 1035425), (35, 828340), (50, 579838), (70, 414170), (83, 349300), (100, 289919), (140, 207085), (166, 174650), (175, 165668), (332, 87325), (350, 82834), (415, 69860), (499, 58100), (581, 49900), (700, 41417), (830, 34930), (998, 29050), (1162, 24950), (1660, 17465), (1996, 14525), (2075, 13972), (2324, 12475), (2495, 11620), (2905, 9980), (3493, 8300), (4150, 6986), (4990, 5810)]