20866100

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 47996928

約数和(自身を除く): 27130828

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 53, 62, 100, 106, 124, 127, 155, 212, 254, 265, 310, 508, 530, 620, 635, 775, 1060, 1270, 1325, 1550, 1643, 2540, 2650, 3100, 3175, 3286, 3937, 5300, 6350, 6572, 6731, 7874, 8215, 12700, 13462, 15748, 16430, 19685, 26924, 32860, 33655, 39370, 41075, 67310, 78740, 82150, 98425, 134620, 164300, 168275, 196850, 208661, 336550, 393700, 417322, 673100, 834644, 1043305, 2086610, 4173220, 5216525, 10433050, 20866100]

約数ペア:

[(1, 20866100), (2, 10433050), (4, 5216525), (5, 4173220), (10, 2086610), (20, 1043305), (25, 834644), (31, 673100), (50, 417322), (53, 393700), (62, 336550), (100, 208661), (106, 196850), (124, 168275), (127, 164300), (155, 134620), (212, 98425), (254, 82150), (265, 78740), (310, 67310), (508, 41075), (530, 39370), (620, 33655), (635, 32860), (775, 26924), (1060, 19685), (1270, 16430), (1325, 15748), (1550, 13462), (1643, 12700), (2540, 8215), (2650, 7874), (3100, 6731), (3175, 6572), (3286, 6350), (3937, 5300)]