21136400

素因数分解:

$2^4\times 5^2\times {\mathrm{53}}^1\times {\mathrm{997}}^1$

素因数の和:1068

約数の個数: 60

約数和(自身を含む): 51790212

約数和(自身を除く): 30653812

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 53, 80, 100, 106, 200, 212, 265, 400, 424, 530, 848, 997, 1060, 1325, 1994, 2120, 2650, 3988, 4240, 4985, 5300, 7976, 9970, 10600, 15952, 19940, 21200, 24925, 39880, 49850, 52841, 79760, 99700, 105682, 199400, 211364, 264205, 398800, 422728, 528410, 845456, 1056820, 1321025, 2113640, 2642050, 4227280, 5284100, 10568200, 21136400]

約数ペア:

[(1, 21136400), (2, 10568200), (4, 5284100), (5, 4227280), (8, 2642050), (10, 2113640), (16, 1321025), (20, 1056820), (25, 845456), (40, 528410), (50, 422728), (53, 398800), (80, 264205), (100, 211364), (106, 199400), (200, 105682), (212, 99700), (265, 79760), (400, 52841), (424, 49850), (530, 39880), (848, 24925), (997, 21200), (1060, 19940), (1325, 15952), (1994, 10600), (2120, 9970), (2650, 7976), (3988, 5300), (4240, 4985)]