21304605

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{181}}^1$

素因数の和:274

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 20628195

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 59, 95, 105, 133, 177, 181, 285, 295, 399, 413, 543, 665, 885, 905, 1121, 1239, 1267, 1995, 2065, 2715, 3363, 3439, 3801, 5605, 6195, 6335, 7847, 10317, 10679, 16815, 17195, 19005, 23541, 24073, 32037, 39235, 51585, 53395, 72219, 74753, 117705, 120365, 160185, 202901, 224259, 361095, 373765, 608703, 1014505, 1121295, 1420307, 3043515, 4260921, 7101535, 21304605]

約数ペア:

[(1, 21304605), (3, 7101535), (5, 4260921), (7, 3043515), (15, 1420307), (19, 1121295), (21, 1014505), (35, 608703), (57, 373765), (59, 361095), (95, 224259), (105, 202901), (133, 160185), (177, 120365), (181, 117705), (285, 74753), (295, 72219), (399, 53395), (413, 51585), (543, 39235), (665, 32037), (885, 24073), (905, 23541), (1121, 19005), (1239, 17195), (1267, 16815), (1995, 10679), (2065, 10317), (2715, 7847), (3363, 6335), (3439, 6195), (3801, 5605)]