21520380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51239}}^1$

素因数の和:51258

約数の個数: 48

約数和(自身を含む): 68866560

約数和(自身を除く): 47346180

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, 51239, 102478, 153717, 204956, 256195, 307434, 358673, 512390, 614868, 717346, 768585, 1024780, 1076019, 1434692, 1537170, 1793365, 2152038, 3074340, 3586730, 4304076, 5380095, 7173460, 10760190, 21520380]

約数ペア:

[(1, 21520380), (2, 10760190), (3, 7173460), (4, 5380095), (5, 4304076), (6, 3586730), (7, 3074340), (10, 2152038), (12, 1793365), (14, 1537170), (15, 1434692), (20, 1076019), (21, 1024780), (28, 768585), (30, 717346), (35, 614868), (42, 512390), (60, 358673), (70, 307434), (84, 256195), (105, 204956), (140, 153717), (210, 102478), (420, 51239)]