18909933

素因数分解:

$3^1\times 7^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1$

素因数の和:111

約数の個数: 64

約数和(自身を含む): 33177600

約数和(自身を除く): 14267667

約数列:

[1, 3, 7, 17, 21, 23, 47, 49, 51, 69, 119, 141, 147, 161, 329, 343, 357, 391, 483, 799, 833, 987, 1029, 1081, 1127, 1173, 2303, 2397, 2499, 2737, 3243, 3381, 5593, 5831, 6909, 7567, 7889, 8211, 16121, 16779, 17493, 18377, 19159, 22701, 23667, 39151, 48363, 52969, 55131, 57477, 117453, 128639, 134113, 158907, 274057, 370783, 385917, 402339, 822171, 900473, 1112349, 2701419, 6303311, 18909933]

約数ペア:

[(1, 18909933), (3, 6303311), (7, 2701419), (17, 1112349), (21, 900473), (23, 822171), (47, 402339), (49, 385917), (51, 370783), (69, 274057), (119, 158907), (141, 134113), (147, 128639), (161, 117453), (329, 57477), (343, 55131), (357, 52969), (391, 48363), (483, 39151), (799, 23667), (833, 22701), (987, 19159), (1029, 18377), (1081, 17493), (1127, 16779), (1173, 16121), (2303, 8211), (2397, 7889), (2499, 7567), (2737, 6909), (3243, 5831), (3381, 5593)]