21582120

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25693}}^1$

素因数の和:25714

約数の個数: 64

約数和(自身を含む): 73998720

約数和(自身を除く): 52416600

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, 25693, 51386, 77079, 102772, 128465, 154158, 179851, 205544, 256930, 308316, 359702, 385395, 513860, 539553, 616632, 719404, 770790, 899255, 1027720, 1079106, 1438808, 1541580, 1798510, 2158212, 2697765, 3083160, 3597020, 4316424, 5395530, 7194040, 10791060, 21582120]

約数ペア:

[(1, 21582120), (2, 10791060), (3, 7194040), (4, 5395530), (5, 4316424), (6, 3597020), (7, 3083160), (8, 2697765), (10, 2158212), (12, 1798510), (14, 1541580), (15, 1438808), (20, 1079106), (21, 1027720), (24, 899255), (28, 770790), (30, 719404), (35, 616632), (40, 539553), (42, 513860), (56, 385395), (60, 359702), (70, 308316), (84, 256930), (105, 205544), (120, 179851), (140, 154158), (168, 128465), (210, 102772), (280, 77079), (420, 51386), (840, 25693)]