21642425

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{283}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 33807360

約数和(自身を除く): 12164935

約数列:

[1, 5, 7, 19, 23, 25, 35, 95, 115, 133, 161, 175, 283, 437, 475, 575, 665, 805, 1415, 1981, 2185, 3059, 3325, 4025, 5377, 6509, 7075, 9905, 10925, 15295, 26885, 32545, 37639, 45563, 49525, 76475, 123671, 134425, 162725, 188195, 227815, 618355, 865697, 940975, 1139075, 3091775, 4328485, 21642425]

約数ペア:

[(1, 21642425), (5, 4328485), (7, 3091775), (19, 1139075), (23, 940975), (25, 865697), (35, 618355), (95, 227815), (115, 188195), (133, 162725), (161, 134425), (175, 123671), (283, 76475), (437, 49525), (475, 45563), (575, 37639), (665, 32545), (805, 26885), (1415, 15295), (1981, 10925), (2185, 9905), (3059, 7075), (3325, 6509), (4025, 5377)]