21722820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51721}}^1$

素因数の和:51740

約数の個数: 48

約数和(自身を含む): 69514368

約数和(自身を除く): 47791548

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51721, 103442, 155163, 206884, 258605, 310326, 362047, 517210, 620652, 724094, 775815, 1034420, 1086141, 1448188, 1551630, 1810235, 2172282, 3103260, 3620470, 4344564, 5430705, 7240940, 10861410, 21722820]

約数ペア:

[(1, 21722820), (2, 10861410), (3, 7240940), (4, 5430705), (5, 4344564), (6, 3620470), (7, 3103260), (10, 2172282), (12, 1810235), (14, 1551630), (15, 1448188), (20, 1086141), (21, 1034420), (28, 775815), (30, 724094), (35, 620652), (42, 517210), (60, 362047), (70, 310326), (84, 258605), (105, 206884), (140, 155163), (210, 103442), (420, 51721)]