20197980173

素因数分解:

$7^2\times {\mathrm{23}}^2\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{281}}^1$

素因数の和:447

約数の個数: 72

約数和(自身を含む): 25600095360

約数和(自身を除く): 5402115187

約数列:

[1, 7, 23, 47, 49, 59, 161, 281, 329, 413, 529, 1081, 1127, 1357, 1967, 2303, 2773, 2891, 3703, 6463, 7567, 9499, 13207, 13769, 16579, 19411, 24863, 25921, 31211, 45241, 52969, 63779, 66493, 92449, 116053, 135877, 148649, 174041, 218477, 303761, 316687, 381317, 446453, 647143, 779213, 812371, 1040543, 1218287, 1466917, 1529339, 2126327, 2669219, 3125171, 5454491, 6986503, 7283801, 8770291, 10268419, 14884289, 17921899, 18684533, 38181437, 48905521, 61392037, 71878933, 125453293, 342338647, 412203677, 429744259, 878173051, 2885425739, 20197980173]

約数ペア:

[(1, 20197980173), (7, 2885425739), (23, 878173051), (47, 429744259), (49, 412203677), (59, 342338647), (161, 125453293), (281, 71878933), (329, 61392037), (413, 48905521), (529, 38181437), (1081, 18684533), (1127, 17921899), (1357, 14884289), (1967, 10268419), (2303, 8770291), (2773, 7283801), (2891, 6986503), (3703, 5454491), (6463, 3125171), (7567, 2669219), (9499, 2126327), (13207, 1529339), (13769, 1466917), (16579, 1218287), (19411, 1040543), (24863, 812371), (25921, 779213), (31211, 647143), (45241, 446453), (52969, 381317), (63779, 316687), (66493, 303761), (92449, 218477), (116053, 174041), (135877, 148649)]