21274965

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{167}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 18037035

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 149, 167, 171, 285, 447, 501, 745, 835, 855, 1341, 1503, 2235, 2505, 2831, 3173, 6705, 7515, 8493, 9519, 14155, 15865, 24883, 25479, 28557, 42465, 47595, 74649, 124415, 127395, 142785, 223947, 373245, 472777, 1119735, 1418331, 2363885, 4254993, 7091655, 21274965]

約数ペア:

[(1, 21274965), (3, 7091655), (5, 4254993), (9, 2363885), (15, 1418331), (19, 1119735), (45, 472777), (57, 373245), (95, 223947), (149, 142785), (167, 127395), (171, 124415), (285, 74649), (447, 47595), (501, 42465), (745, 28557), (835, 25479), (855, 24883), (1341, 15865), (1503, 14155), (2235, 9519), (2505, 8493), (2831, 7515), (3173, 6705)]