20723220

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16447}}^1$

素因数の和:16469

約数の個数: 72

約数和(自身を含む): 71844864

約数和(自身を除く): 51121644

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, 16447, 32894, 49341, 65788, 82235, 98682, 115129, 148023, 164470, 197364, 230258, 246705, 296046, 328940, 345387, 460516, 493410, 575645, 592092, 690774, 740115, 986820, 1036161, 1151290, 1381548, 1480230, 1726935, 2072322, 2302580, 2960460, 3453870, 4144644, 5180805, 6907740, 10361610, 20723220]

約数ペア:

[(1, 20723220), (2, 10361610), (3, 6907740), (4, 5180805), (5, 4144644), (6, 3453870), (7, 2960460), (9, 2302580), (10, 2072322), (12, 1726935), (14, 1480230), (15, 1381548), (18, 1151290), (20, 1036161), (21, 986820), (28, 740115), (30, 690774), (35, 592092), (36, 575645), (42, 493410), (45, 460516), (60, 345387), (63, 328940), (70, 296046), (84, 246705), (90, 230258), (105, 197364), (126, 164470), (140, 148023), (180, 115129), (210, 98682), (252, 82235), (315, 65788), (420, 49341), (630, 32894), (1260, 16447)]