21143640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25171}}^1$

素因数の和:25192

約数の個数: 64

約数和(自身を含む): 72495360

約数和(自身を除く): 51351720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25171, 50342, 75513, 100684, 125855, 151026, 176197, 201368, 251710, 302052, 352394, 377565, 503420, 528591, 604104, 704788, 755130, 880985, 1006840, 1057182, 1409576, 1510260, 1761970, 2114364, 2642955, 3020520, 3523940, 4228728, 5285910, 7047880, 10571820, 21143640]

約数ペア:

[(1, 21143640), (2, 10571820), (3, 7047880), (4, 5285910), (5, 4228728), (6, 3523940), (7, 3020520), (8, 2642955), (10, 2114364), (12, 1761970), (14, 1510260), (15, 1409576), (20, 1057182), (21, 1006840), (24, 880985), (28, 755130), (30, 704788), (35, 604104), (40, 528591), (42, 503420), (56, 377565), (60, 352394), (70, 302052), (84, 251710), (105, 201368), (120, 176197), (140, 151026), (168, 125855), (210, 100684), (280, 75513), (420, 50342), (840, 25171)]