20416725

素因数分解:

$3^3\times 5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:204

約数の個数: 96

約数和(自身を含む): 44640000

約数和(自身を除く): 24223275

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 29, 35, 45, 63, 75, 87, 105, 135, 145, 149, 175, 189, 203, 225, 261, 315, 435, 447, 525, 609, 675, 725, 745, 783, 945, 1015, 1043, 1305, 1341, 1575, 1827, 2175, 2235, 3045, 3129, 3725, 3915, 4023, 4321, 4725, 5075, 5215, 5481, 6525, 6705, 9135, 9387, 11175, 12963, 15225, 15645, 19575, 20115, 21605, 26075, 27405, 28161, 30247, 33525, 38889, 45675, 46935, 64815, 78225, 90741, 100575, 108025, 116667, 137025, 140805, 151235, 194445, 234675, 272223, 324075, 453705, 583335, 704025, 756175, 816669, 972225, 1361115, 2268525, 2916675, 4083345, 6805575, 20416725]

約数ペア:

[(1, 20416725), (3, 6805575), (5, 4083345), (7, 2916675), (9, 2268525), (15, 1361115), (21, 972225), (25, 816669), (27, 756175), (29, 704025), (35, 583335), (45, 453705), (63, 324075), (75, 272223), (87, 234675), (105, 194445), (135, 151235), (145, 140805), (149, 137025), (175, 116667), (189, 108025), (203, 100575), (225, 90741), (261, 78225), (315, 64815), (435, 46935), (447, 45675), (525, 38889), (609, 33525), (675, 30247), (725, 28161), (745, 27405), (783, 26075), (945, 21605), (1015, 20115), (1043, 19575), (1305, 15645), (1341, 15225), (1575, 12963), (1827, 11175), (2175, 9387), (2235, 9135), (3045, 6705), (3129, 6525), (3725, 5481), (3915, 5215), (4023, 5075), (4321, 4725)]