20509736

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{991}}^1$

素因数の和:1209

約数の個数: 32

約数和(自身を含む): 41664000

約数和(自身を除く): 21154264

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 199, 398, 796, 991, 1592, 1982, 2587, 3964, 5174, 7928, 10348, 12883, 20696, 25766, 51532, 103064, 197209, 394418, 788836, 1577672, 2563717, 5127434, 10254868, 20509736]

約数ペア:

[(1, 20509736), (2, 10254868), (4, 5127434), (8, 2563717), (13, 1577672), (26, 788836), (52, 394418), (104, 197209), (199, 103064), (398, 51532), (796, 25766), (991, 20696), (1592, 12883), (1982, 10348), (2587, 7928), (3964, 5174)]