21217995

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{229}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 38750400

約数和(自身を除く): 17532405

約数列:

[1, 3, 5, 9, 15, 29, 45, 71, 87, 145, 213, 229, 261, 355, 435, 639, 687, 1065, 1145, 1305, 2059, 2061, 3195, 3435, 6177, 6641, 10295, 10305, 16259, 18531, 19923, 30885, 33205, 48777, 59769, 81295, 92655, 99615, 146331, 243885, 298845, 471511, 731655, 1414533, 2357555, 4243599, 7072665, 21217995]

約数ペア:

[(1, 21217995), (3, 7072665), (5, 4243599), (9, 2357555), (15, 1414533), (29, 731655), (45, 471511), (71, 298845), (87, 243885), (145, 146331), (213, 99615), (229, 92655), (261, 81295), (355, 59769), (435, 48777), (639, 33205), (687, 30885), (1065, 19923), (1145, 18531), (1305, 16259), (2059, 10305), (2061, 10295), (3195, 6641), (3435, 6177)]