891405

素因数分解:

$3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:119

約数の個数: 40

約数和(自身を含む): 1672704

約数和(自身を除く): 781299

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 71, 81, 93, 135, 155, 213, 279, 355, 405, 465, 639, 837, 1065, 1395, 1917, 2201, 2511, 3195, 4185, 5751, 6603, 9585, 11005, 12555, 19809, 28755, 33015, 59427, 99045, 178281, 297135, 891405]

約数ペア:

[(1, 891405), (3, 297135), (5, 178281), (9, 99045), (15, 59427), (27, 33015), (31, 28755), (45, 19809), (71, 12555), (81, 11005), (93, 9585), (135, 6603), (155, 5751), (213, 4185), (279, 3195), (355, 2511), (405, 2201), (465, 1917), (639, 1395), (837, 1065)]