19810065

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:198

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 17514735

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 71, 89, 95, 165, 209, 213, 267, 285, 355, 445, 627, 781, 979, 1045, 1065, 1335, 1349, 1691, 2343, 2937, 3135, 3905, 4047, 4895, 5073, 6319, 6745, 8455, 11715, 14685, 14839, 18601, 18957, 20235, 25365, 31595, 44517, 55803, 69509, 74195, 93005, 94785, 120061, 208527, 222585, 279015, 347545, 360183, 600305, 1042635, 1320671, 1800915, 3962013, 6603355, 19810065]

約数ペア:

[(1, 19810065), (3, 6603355), (5, 3962013), (11, 1800915), (15, 1320671), (19, 1042635), (33, 600305), (55, 360183), (57, 347545), (71, 279015), (89, 222585), (95, 208527), (165, 120061), (209, 94785), (213, 93005), (267, 74195), (285, 69509), (355, 55803), (445, 44517), (627, 31595), (781, 25365), (979, 20235), (1045, 18957), (1065, 18601), (1335, 14839), (1349, 14685), (1691, 11715), (2343, 8455), (2937, 6745), (3135, 6319), (3905, 5073), (4047, 4895)]