21376425

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2143}}^1$

素因数の和:2182

約数の個数: 48

約数和(自身を含む): 42536960

約数和(自身を除く): 21160535

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 95, 105, 133, 175, 285, 399, 475, 525, 665, 1425, 1995, 2143, 3325, 6429, 9975, 10715, 15001, 32145, 40717, 45003, 53575, 75005, 122151, 160725, 203585, 225015, 285019, 375025, 610755, 855057, 1017925, 1125075, 1425095, 3053775, 4275285, 7125475, 21376425]

約数ペア:

[(1, 21376425), (3, 7125475), (5, 4275285), (7, 3053775), (15, 1425095), (19, 1125075), (21, 1017925), (25, 855057), (35, 610755), (57, 375025), (75, 285019), (95, 225015), (105, 203585), (133, 160725), (175, 122151), (285, 75005), (399, 53575), (475, 45003), (525, 40717), (665, 32145), (1425, 15001), (1995, 10715), (2143, 9975), (3325, 6429)]