81820004

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:337

約数の個数: 72

約数和(自身を含む): 177730560

約数和(自身を除く): 95910556

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 76, 98, 127, 133, 173, 196, 254, 266, 346, 508, 532, 692, 889, 931, 1211, 1778, 1862, 2413, 2422, 3287, 3556, 3724, 4826, 4844, 6223, 6574, 8477, 9652, 12446, 13148, 16891, 16954, 21971, 23009, 24892, 33782, 33908, 43942, 46018, 67564, 87884, 92036, 118237, 153797, 161063, 236474, 307594, 322126, 417449, 472948, 615188, 644252, 834898, 1076579, 1669796, 2153158, 2922143, 4306316, 5844286, 11688572, 20455001, 40910002, 81820004]

約数ペア:

[(1, 81820004), (2, 40910002), (4, 20455001), (7, 11688572), (14, 5844286), (19, 4306316), (28, 2922143), (38, 2153158), (49, 1669796), (76, 1076579), (98, 834898), (127, 644252), (133, 615188), (173, 472948), (196, 417449), (254, 322126), (266, 307594), (346, 236474), (508, 161063), (532, 153797), (692, 118237), (889, 92036), (931, 87884), (1211, 67564), (1778, 46018), (1862, 43942), (2413, 33908), (2422, 33782), (3287, 24892), (3556, 23009), (3724, 21971), (4826, 16954), (4844, 16891), (6223, 13148), (6574, 12446), (8477, 9652)]