20778856

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{331}}^1$

素因数の和:422

約数の個数: 64

約数和(自身を含む): 47808000

約数和(自身を除く): 27029144

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 59, 76, 118, 133, 152, 236, 266, 331, 413, 472, 532, 662, 826, 1064, 1121, 1324, 1652, 2242, 2317, 2648, 3304, 4484, 4634, 6289, 7847, 8968, 9268, 12578, 15694, 18536, 19529, 25156, 31388, 39058, 44023, 50312, 62776, 78116, 88046, 136703, 156232, 176092, 273406, 352184, 371051, 546812, 742102, 1093624, 1484204, 2597357, 2968408, 5194714, 10389428, 20778856]

約数ペア:

[(1, 20778856), (2, 10389428), (4, 5194714), (7, 2968408), (8, 2597357), (14, 1484204), (19, 1093624), (28, 742102), (38, 546812), (56, 371051), (59, 352184), (76, 273406), (118, 176092), (133, 156232), (152, 136703), (236, 88046), (266, 78116), (331, 62776), (413, 50312), (472, 44023), (532, 39058), (662, 31388), (826, 25156), (1064, 19529), (1121, 18536), (1324, 15694), (1652, 12578), (2242, 9268), (2317, 8968), (2648, 7847), (3304, 6289), (4484, 4634)]