21207480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25247}}^1$

素因数の和:25268

約数の個数: 64

約数和(自身を含む): 72714240

約数和(自身を除く): 51506760

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, 25247, 50494, 75741, 100988, 126235, 151482, 176729, 201976, 252470, 302964, 353458, 378705, 504940, 530187, 605928, 706916, 757410, 883645, 1009880, 1060374, 1413832, 1514820, 1767290, 2120748, 2650935, 3029640, 3534580, 4241496, 5301870, 7069160, 10603740, 21207480]

約数ペア:

[(1, 21207480), (2, 10603740), (3, 7069160), (4, 5301870), (5, 4241496), (6, 3534580), (7, 3029640), (8, 2650935), (10, 2120748), (12, 1767290), (14, 1514820), (15, 1413832), (20, 1060374), (21, 1009880), (24, 883645), (28, 757410), (30, 706916), (35, 605928), (40, 530187), (42, 504940), (56, 378705), (60, 353458), (70, 302964), (84, 252470), (105, 201976), (120, 176729), (140, 151482), (168, 126235), (210, 100988), (280, 75741), (420, 50494), (840, 25247)]