21511245

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:179

約数の個数: 64

約数和(自身を含む): 41587200

約数和(自身を除く): 20075955

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 49, 105, 111, 113, 147, 185, 245, 259, 339, 343, 555, 565, 735, 777, 791, 1029, 1295, 1695, 1715, 1813, 2373, 3885, 3955, 4181, 5145, 5439, 5537, 9065, 11865, 12543, 12691, 16611, 20905, 27195, 27685, 29267, 38073, 38759, 62715, 63455, 83055, 87801, 116277, 146335, 190365, 193795, 204869, 439005, 581385, 614607, 1024345, 1434083, 3073035, 4302249, 7170415, 21511245]

約数ペア:

[(1, 21511245), (3, 7170415), (5, 4302249), (7, 3073035), (15, 1434083), (21, 1024345), (35, 614607), (37, 581385), (49, 439005), (105, 204869), (111, 193795), (113, 190365), (147, 146335), (185, 116277), (245, 87801), (259, 83055), (339, 63455), (343, 62715), (555, 38759), (565, 38073), (735, 29267), (777, 27685), (791, 27195), (1029, 20905), (1295, 16611), (1695, 12691), (1715, 12543), (1813, 11865), (2373, 9065), (3885, 5537), (3955, 5439), (4181, 5145)]