81651645

素因数分解:

$3^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 155881440

約数和(自身を除く): 74229795

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 81, 95, 131, 135, 171, 243, 285, 393, 405, 513, 655, 729, 855, 1179, 1215, 1539, 1965, 2187, 2489, 2565, 3537, 3645, 4617, 5895, 6561, 7467, 7695, 10611, 10935, 12445, 13851, 17685, 22401, 23085, 31833, 32805, 37335, 41553, 53055, 67203, 69255, 95499, 112005, 124659, 159165, 201609, 207765, 286497, 336015, 477495, 604827, 623295, 859491, 1008045, 1432485, 1814481, 3024135, 4297455, 5443443, 9072405, 16330329, 27217215, 81651645]

約数ペア:

[(1, 81651645), (3, 27217215), (5, 16330329), (9, 9072405), (15, 5443443), (19, 4297455), (27, 3024135), (45, 1814481), (57, 1432485), (81, 1008045), (95, 859491), (131, 623295), (135, 604827), (171, 477495), (243, 336015), (285, 286497), (393, 207765), (405, 201609), (513, 159165), (655, 124659), (729, 112005), (855, 95499), (1179, 69255), (1215, 67203), (1539, 53055), (1965, 41553), (2187, 37335), (2489, 32805), (2565, 31833), (3537, 23085), (3645, 22401), (4617, 17685), (5895, 13851), (6561, 12445), (7467, 10935), (7695, 10611)]