21253260

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7229}}^1$

素因数の和:7255

約数の個数: 72

約数和(自身を含む): 69234480

約数和(自身を除く): 47981220

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7229, 14458, 21687, 28916, 36145, 43374, 50603, 72290, 86748, 101206, 108435, 144580, 151809, 202412, 216870, 253015, 303618, 354221, 433740, 506030, 607236, 708442, 759045, 1012060, 1062663, 1416884, 1518090, 1771105, 2125326, 3036180, 3542210, 4250652, 5313315, 7084420, 10626630, 21253260]

約数ペア:

[(1, 21253260), (2, 10626630), (3, 7084420), (4, 5313315), (5, 4250652), (6, 3542210), (7, 3036180), (10, 2125326), (12, 1771105), (14, 1518090), (15, 1416884), (20, 1062663), (21, 1012060), (28, 759045), (30, 708442), (35, 607236), (42, 506030), (49, 433740), (60, 354221), (70, 303618), (84, 253015), (98, 216870), (105, 202412), (140, 151809), (147, 144580), (196, 108435), (210, 101206), (245, 86748), (294, 72290), (420, 50603), (490, 43374), (588, 36145), (735, 28916), (980, 21687), (1470, 14458), (2940, 7229)]