20952645

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{983}}^1$

素因数の和:1034

約数の個数: 48

約数和(自身を含む): 40383360

約数和(自身を除く): 19430715

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 49, 87, 105, 145, 147, 203, 245, 435, 609, 735, 983, 1015, 1421, 2949, 3045, 4263, 4915, 6881, 7105, 14745, 20643, 21315, 28507, 34405, 48167, 85521, 103215, 142535, 144501, 199549, 240835, 427605, 598647, 722505, 997745, 1396843, 2993235, 4190529, 6984215, 20952645]

約数ペア:

[(1, 20952645), (3, 6984215), (5, 4190529), (7, 2993235), (15, 1396843), (21, 997745), (29, 722505), (35, 598647), (49, 427605), (87, 240835), (105, 199549), (145, 144501), (147, 142535), (203, 103215), (245, 85521), (435, 48167), (609, 34405), (735, 28507), (983, 21315), (1015, 20643), (1421, 14745), (2949, 7105), (3045, 6881), (4263, 4915)]