21084705

素因数分解:

$3^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{659}}^1$

素因数の和:755

約数の個数: 40

約数和(自身を含む): 38332800

約数和(自身を除く): 17248095

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 81, 135, 237, 395, 405, 659, 711, 1185, 1977, 2133, 3295, 3555, 5931, 6399, 9885, 10665, 17793, 29655, 31995, 52061, 53379, 88965, 156183, 260305, 266895, 468549, 780915, 1405647, 2342745, 4216941, 7028235, 21084705]

約数ペア:

[(1, 21084705), (3, 7028235), (5, 4216941), (9, 2342745), (15, 1405647), (27, 780915), (45, 468549), (79, 266895), (81, 260305), (135, 156183), (237, 88965), (395, 53379), (405, 52061), (659, 31995), (711, 29655), (1185, 17793), (1977, 10665), (2133, 9885), (3295, 6399), (3555, 5931)]