21027465

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:215

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18889335

約数列:

[1, 3, 5, 9, 15, 27, 29, 41, 45, 87, 123, 131, 135, 145, 205, 261, 369, 393, 435, 615, 655, 783, 1107, 1179, 1189, 1305, 1845, 1965, 3537, 3567, 3799, 3915, 5371, 5535, 5895, 5945, 10701, 11397, 16113, 17685, 17835, 18995, 26855, 32103, 34191, 48339, 53505, 56985, 80565, 102573, 145017, 155759, 160515, 170955, 241695, 467277, 512865, 725085, 778795, 1401831, 2336385, 4205493, 7009155, 21027465]

約数ペア:

[(1, 21027465), (3, 7009155), (5, 4205493), (9, 2336385), (15, 1401831), (27, 778795), (29, 725085), (41, 512865), (45, 467277), (87, 241695), (123, 170955), (131, 160515), (135, 155759), (145, 145017), (205, 102573), (261, 80565), (369, 56985), (393, 53505), (435, 48339), (615, 34191), (655, 32103), (783, 26855), (1107, 18995), (1179, 17835), (1189, 17685), (1305, 16113), (1845, 11397), (1965, 10701), (3537, 5945), (3567, 5895), (3799, 5535), (3915, 5371)]