19902015

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 42771456

約数和(自身を除く): 22869441

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 35, 41, 45, 63, 67, 69, 105, 115, 123, 161, 201, 205, 207, 287, 315, 335, 345, 369, 469, 483, 603, 615, 805, 861, 943, 1005, 1035, 1407, 1435, 1449, 1541, 1845, 2345, 2415, 2583, 2747, 2829, 3015, 4221, 4305, 4623, 4715, 6601, 7035, 7245, 7705, 8241, 8487, 10787, 12915, 13735, 13869, 14145, 19229, 19803, 21105, 23115, 24723, 32361, 33005, 41205, 42435, 53935, 57687, 59409, 63181, 69345, 96145, 97083, 99015, 123615, 161805, 173061, 189543, 288435, 297045, 315905, 442267, 485415, 568629, 865305, 947715, 1326801, 2211335, 2843145, 3980403, 6634005, 19902015]

約数ペア:

[(1, 19902015), (3, 6634005), (5, 3980403), (7, 2843145), (9, 2211335), (15, 1326801), (21, 947715), (23, 865305), (35, 568629), (41, 485415), (45, 442267), (63, 315905), (67, 297045), (69, 288435), (105, 189543), (115, 173061), (123, 161805), (161, 123615), (201, 99015), (205, 97083), (207, 96145), (287, 69345), (315, 63181), (335, 59409), (345, 57687), (369, 53935), (469, 42435), (483, 41205), (603, 33005), (615, 32361), (805, 24723), (861, 23115), (943, 21105), (1005, 19803), (1035, 19229), (1407, 14145), (1435, 13869), (1449, 13735), (1541, 12915), (1845, 10787), (2345, 8487), (2415, 8241), (2583, 7705), (2747, 7245), (2829, 7035), (3015, 6601), (4221, 4715), (4305, 4623)]