21069195

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{179}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 20402805

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 59, 95, 105, 133, 177, 179, 285, 295, 399, 413, 537, 665, 885, 895, 1121, 1239, 1253, 1995, 2065, 2685, 3363, 3401, 3759, 5605, 6195, 6265, 7847, 10203, 10561, 16815, 17005, 18795, 23541, 23807, 31683, 39235, 51015, 52805, 71421, 73927, 117705, 119035, 158415, 200659, 221781, 357105, 369635, 601977, 1003295, 1108905, 1404613, 3009885, 4213839, 7023065, 21069195]

約数ペア:

[(1, 21069195), (3, 7023065), (5, 4213839), (7, 3009885), (15, 1404613), (19, 1108905), (21, 1003295), (35, 601977), (57, 369635), (59, 357105), (95, 221781), (105, 200659), (133, 158415), (177, 119035), (179, 117705), (285, 73927), (295, 71421), (399, 52805), (413, 51015), (537, 39235), (665, 31683), (885, 23807), (895, 23541), (1121, 18795), (1239, 17005), (1253, 16815), (1995, 10561), (2065, 10203), (2685, 7847), (3363, 6265), (3401, 6195), (3759, 5605)]