20811315

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 41057280

約数和(自身を除く): 20245965

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 89, 105, 119, 131, 255, 267, 357, 393, 445, 595, 623, 655, 917, 1335, 1513, 1785, 1869, 1965, 2227, 2751, 3115, 4539, 4585, 6681, 7565, 9345, 10591, 11135, 11659, 13755, 15589, 22695, 31773, 33405, 34977, 46767, 52955, 58295, 77945, 81613, 158865, 174885, 198203, 233835, 244839, 408065, 594609, 991015, 1224195, 1387421, 2973045, 4162263, 6937105, 20811315]

約数ペア:

[(1, 20811315), (3, 6937105), (5, 4162263), (7, 2973045), (15, 1387421), (17, 1224195), (21, 991015), (35, 594609), (51, 408065), (85, 244839), (89, 233835), (105, 198203), (119, 174885), (131, 158865), (255, 81613), (267, 77945), (357, 58295), (393, 52955), (445, 46767), (595, 34977), (623, 33405), (655, 31773), (917, 22695), (1335, 15589), (1513, 13755), (1785, 11659), (1869, 11135), (1965, 10591), (2227, 9345), (2751, 7565), (3115, 6681), (4539, 4585)]