20938225

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 33033600

約数和(自身を除く): 12095375

約数列:

[1, 5, 7, 11, 25, 35, 55, 73, 77, 149, 175, 275, 365, 385, 511, 745, 803, 1043, 1639, 1825, 1925, 2555, 3725, 4015, 5215, 5621, 8195, 10877, 11473, 12775, 20075, 26075, 28105, 40975, 54385, 57365, 76139, 119647, 140525, 271925, 286825, 380695, 598235, 837529, 1903475, 2991175, 4187645, 20938225]

約数ペア:

[(1, 20938225), (5, 4187645), (7, 2991175), (11, 1903475), (25, 837529), (35, 598235), (55, 380695), (73, 286825), (77, 271925), (149, 140525), (175, 119647), (275, 76139), (365, 57365), (385, 54385), (511, 40975), (745, 28105), (803, 26075), (1043, 20075), (1639, 12775), (1825, 11473), (1925, 10877), (2555, 8195), (3725, 5621), (4015, 5215)]