21542640

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12823}}^1$

素因数の和:12846

約数の個数: 80

約数和(自身を含む): 76328448

約数和(自身を除く): 54785808

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12823, 25646, 38469, 51292, 64115, 76938, 89761, 102584, 128230, 153876, 179522, 192345, 205168, 256460, 269283, 307752, 359044, 384690, 448805, 512920, 538566, 615504, 718088, 769380, 897610, 1025840, 1077132, 1346415, 1436176, 1538760, 1795220, 2154264, 2692830, 3077520, 3590440, 4308528, 5385660, 7180880, 10771320, 21542640]

約数ペア:

[(1, 21542640), (2, 10771320), (3, 7180880), (4, 5385660), (5, 4308528), (6, 3590440), (7, 3077520), (8, 2692830), (10, 2154264), (12, 1795220), (14, 1538760), (15, 1436176), (16, 1346415), (20, 1077132), (21, 1025840), (24, 897610), (28, 769380), (30, 718088), (35, 615504), (40, 538566), (42, 512920), (48, 448805), (56, 384690), (60, 359044), (70, 307752), (80, 269283), (84, 256460), (105, 205168), (112, 192345), (120, 179522), (140, 153876), (168, 128230), (210, 102584), (240, 89761), (280, 76938), (336, 64115), (420, 51292), (560, 38469), (840, 25646), (1680, 12823)]