21331755

素因数分解:

$3^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{181}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 38953824

約数和(自身を除く): 17622069

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 97, 135, 181, 243, 291, 405, 485, 543, 873, 905, 1215, 1455, 1629, 2619, 2715, 4365, 4887, 7857, 8145, 13095, 14661, 17557, 23571, 24435, 39285, 43983, 52671, 73305, 87785, 117855, 158013, 219915, 263355, 474039, 790065, 1422117, 2370195, 4266351, 7110585, 21331755]

約数ペア:

[(1, 21331755), (3, 7110585), (5, 4266351), (9, 2370195), (15, 1422117), (27, 790065), (45, 474039), (81, 263355), (97, 219915), (135, 158013), (181, 117855), (243, 87785), (291, 73305), (405, 52671), (485, 43983), (543, 39285), (873, 24435), (905, 23571), (1215, 17557), (1455, 14661), (1629, 13095), (2619, 8145), (2715, 7857), (4365, 4887)]