21393100

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 49107968

約数和(自身を除く): 27714868

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 67, 100, 103, 124, 134, 155, 206, 268, 310, 335, 412, 515, 620, 670, 775, 1030, 1340, 1550, 1675, 2060, 2077, 2575, 3100, 3193, 3350, 4154, 5150, 6386, 6700, 6901, 8308, 10300, 10385, 12772, 13802, 15965, 20770, 27604, 31930, 34505, 41540, 51925, 63860, 69010, 79825, 103850, 138020, 159650, 172525, 207700, 213931, 319300, 345050, 427862, 690100, 855724, 1069655, 2139310, 4278620, 5348275, 10696550, 21393100]

約数ペア:

[(1, 21393100), (2, 10696550), (4, 5348275), (5, 4278620), (10, 2139310), (20, 1069655), (25, 855724), (31, 690100), (50, 427862), (62, 345050), (67, 319300), (100, 213931), (103, 207700), (124, 172525), (134, 159650), (155, 138020), (206, 103850), (268, 79825), (310, 69010), (335, 63860), (412, 51925), (515, 41540), (620, 34505), (670, 31930), (775, 27604), (1030, 20770), (1340, 15965), (1550, 13802), (1675, 12772), (2060, 10385), (2077, 10300), (2575, 8308), (3100, 6901), (3193, 6700), (3350, 6386), (4154, 5150)]