19721247

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:152

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 15115233

約数列:

[1, 3, 7, 13, 21, 29, 39, 47, 53, 87, 91, 141, 159, 203, 273, 329, 371, 377, 609, 611, 689, 987, 1113, 1131, 1363, 1537, 1833, 2067, 2491, 2639, 4089, 4277, 4611, 4823, 7473, 7917, 9541, 10759, 12831, 14469, 17437, 17719, 19981, 28623, 32277, 32383, 52311, 53157, 59943, 72239, 97149, 124033, 139867, 216717, 226681, 372099, 419601, 505673, 680043, 939107, 1517019, 2817321, 6573749, 19721247]

約数ペア:

[(1, 19721247), (3, 6573749), (7, 2817321), (13, 1517019), (21, 939107), (29, 680043), (39, 505673), (47, 419601), (53, 372099), (87, 226681), (91, 216717), (141, 139867), (159, 124033), (203, 97149), (273, 72239), (329, 59943), (371, 53157), (377, 52311), (609, 32383), (611, 32277), (689, 28623), (987, 19981), (1113, 17719), (1131, 17437), (1363, 14469), (1537, 12831), (1833, 10759), (2067, 9541), (2491, 7917), (2639, 7473), (4089, 4823), (4277, 4611)]