20856780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16553}}^1$

素因数の和:16575

約数の個数: 72

約数和(自身を含む): 72307872

約数和(自身を除く): 51451092

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16553, 33106, 49659, 66212, 82765, 99318, 115871, 148977, 165530, 198636, 231742, 248295, 297954, 331060, 347613, 463484, 496590, 579355, 595908, 695226, 744885, 993180, 1042839, 1158710, 1390452, 1489770, 1738065, 2085678, 2317420, 2979540, 3476130, 4171356, 5214195, 6952260, 10428390, 20856780]

約数ペア:

[(1, 20856780), (2, 10428390), (3, 6952260), (4, 5214195), (5, 4171356), (6, 3476130), (7, 2979540), (9, 2317420), (10, 2085678), (12, 1738065), (14, 1489770), (15, 1390452), (18, 1158710), (20, 1042839), (21, 993180), (28, 744885), (30, 695226), (35, 595908), (36, 579355), (42, 496590), (45, 463484), (60, 347613), (63, 331060), (70, 297954), (84, 248295), (90, 231742), (105, 198636), (126, 165530), (140, 148977), (180, 115871), (210, 99318), (252, 82765), (315, 66212), (420, 49659), (630, 33106), (1260, 16553)]