19819905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{283}}^1$

素因数の和:350

約数の個数: 64

約数和(自身を含む): 39260160

約数和(自身を除く): 19440255

約数列:

[1, 3, 5, 7, 15, 21, 23, 29, 35, 69, 87, 105, 115, 145, 161, 203, 283, 345, 435, 483, 609, 667, 805, 849, 1015, 1415, 1981, 2001, 2415, 3045, 3335, 4245, 4669, 5943, 6509, 8207, 9905, 10005, 14007, 19527, 23345, 24621, 29715, 32545, 41035, 45563, 57449, 70035, 97635, 123105, 136689, 172347, 188761, 227815, 287245, 566283, 683445, 861735, 943805, 1321327, 2831415, 3963981, 6606635, 19819905]

約数ペア:

[(1, 19819905), (3, 6606635), (5, 3963981), (7, 2831415), (15, 1321327), (21, 943805), (23, 861735), (29, 683445), (35, 566283), (69, 287245), (87, 227815), (105, 188761), (115, 172347), (145, 136689), (161, 123105), (203, 97635), (283, 70035), (345, 57449), (435, 45563), (483, 41035), (609, 32545), (667, 29715), (805, 24621), (849, 23345), (1015, 19527), (1415, 14007), (1981, 10005), (2001, 9905), (2415, 8207), (3045, 6509), (3335, 5943), (4245, 4669)]