81993816

素因数分解:

$2^3\times 3^3\times {\mathrm{19}}^1\times {\mathrm{19979}}^1$

素因数の和:20013

約数の個数: 64

約数和(自身を含む): 239760000

約数和(自身を除く): 157766184

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 19, 24, 27, 36, 38, 54, 57, 72, 76, 108, 114, 152, 171, 216, 228, 342, 456, 513, 684, 1026, 1368, 2052, 4104, 19979, 39958, 59937, 79916, 119874, 159832, 179811, 239748, 359622, 379601, 479496, 539433, 719244, 759202, 1078866, 1138803, 1438488, 1518404, 2157732, 2277606, 3036808, 3416409, 4315464, 4555212, 6832818, 9110424, 10249227, 13665636, 20498454, 27331272, 40996908, 81993816]

約数ペア:

[(1, 81993816), (2, 40996908), (3, 27331272), (4, 20498454), (6, 13665636), (8, 10249227), (9, 9110424), (12, 6832818), (18, 4555212), (19, 4315464), (24, 3416409), (27, 3036808), (36, 2277606), (38, 2157732), (54, 1518404), (57, 1438488), (72, 1138803), (76, 1078866), (108, 759202), (114, 719244), (152, 539433), (171, 479496), (216, 379601), (228, 359622), (342, 239748), (456, 179811), (513, 159832), (684, 119874), (1026, 79916), (1368, 59937), (2052, 39958), (4104, 19979)]