21438921

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{373}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 36837504

約数和(自身を除く): 15398583

約数列:

[1, 3, 7, 17, 21, 23, 49, 51, 69, 119, 147, 161, 357, 373, 391, 483, 833, 1119, 1127, 1173, 2499, 2611, 2737, 3381, 6341, 7833, 8211, 8579, 18277, 19023, 19159, 25737, 44387, 54831, 57477, 60053, 133161, 145843, 180159, 310709, 420371, 437529, 932127, 1020901, 1261113, 3062703, 7146307, 21438921]

約数ペア:

[(1, 21438921), (3, 7146307), (7, 3062703), (17, 1261113), (21, 1020901), (23, 932127), (49, 437529), (51, 420371), (69, 310709), (119, 180159), (147, 145843), (161, 133161), (357, 60053), (373, 57477), (391, 54831), (483, 44387), (833, 25737), (1119, 19159), (1127, 19023), (1173, 18277), (2499, 8579), (2611, 8211), (2737, 7833), (3381, 6341)]