21820528

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:146

約数の個数: 80

約数和(自身を含む): 47496960

約数和(自身を除く): 25676432

約数列:

[1, 2, 4, 8, 16, 29, 31, 37, 41, 58, 62, 74, 82, 116, 124, 148, 164, 232, 248, 296, 328, 464, 496, 592, 656, 899, 1073, 1147, 1189, 1271, 1517, 1798, 2146, 2294, 2378, 2542, 3034, 3596, 4292, 4588, 4756, 5084, 6068, 7192, 8584, 9176, 9512, 10168, 12136, 14384, 17168, 18352, 19024, 20336, 24272, 33263, 36859, 43993, 47027, 66526, 73718, 87986, 94054, 133052, 147436, 175972, 188108, 266104, 294872, 351944, 376216, 532208, 589744, 703888, 752432, 1363783, 2727566, 5455132, 10910264, 21820528]

約数ペア:

[(1, 21820528), (2, 10910264), (4, 5455132), (8, 2727566), (16, 1363783), (29, 752432), (31, 703888), (37, 589744), (41, 532208), (58, 376216), (62, 351944), (74, 294872), (82, 266104), (116, 188108), (124, 175972), (148, 147436), (164, 133052), (232, 94054), (248, 87986), (296, 73718), (328, 66526), (464, 47027), (496, 43993), (592, 36859), (656, 33263), (899, 24272), (1073, 20336), (1147, 19024), (1189, 18352), (1271, 17168), (1517, 14384), (1798, 12136), (2146, 10168), (2294, 9512), (2378, 9176), (2542, 8584), (3034, 7192), (3596, 6068), (4292, 5084), (4588, 4756)]