19810395

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1291}}^1$

素因数の和:1344

約数の個数: 48

約数和(自身を含む): 38697984

約数和(自身を除く): 18887589

約数列:

[1, 3, 5, 9, 11, 15, 31, 33, 45, 55, 93, 99, 155, 165, 279, 341, 465, 495, 1023, 1291, 1395, 1705, 3069, 3873, 5115, 6455, 11619, 14201, 15345, 19365, 40021, 42603, 58095, 71005, 120063, 127809, 200105, 213015, 360189, 440231, 600315, 639045, 1320693, 1800945, 2201155, 3962079, 6603465, 19810395]

約数ペア:

[(1, 19810395), (3, 6603465), (5, 3962079), (9, 2201155), (11, 1800945), (15, 1320693), (31, 639045), (33, 600315), (45, 440231), (55, 360189), (93, 213015), (99, 200105), (155, 127809), (165, 120063), (279, 71005), (341, 58095), (465, 42603), (495, 40021), (1023, 19365), (1291, 15345), (1395, 14201), (1705, 11619), (3069, 6455), (3873, 5115)]