21462590

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 43338240

約数和(自身を除く): 21875650

約数列:

[1, 2, 5, 10, 19, 37, 38, 43, 71, 74, 86, 95, 142, 185, 190, 215, 355, 370, 430, 703, 710, 817, 1349, 1406, 1591, 1634, 2627, 2698, 3053, 3182, 3515, 4085, 5254, 6106, 6745, 7030, 7955, 8170, 13135, 13490, 15265, 15910, 26270, 30229, 30530, 49913, 58007, 60458, 99826, 112961, 116014, 151145, 225922, 249565, 290035, 302290, 499130, 564805, 580070, 1129610, 2146259, 4292518, 10731295, 21462590]

約数ペア:

[(1, 21462590), (2, 10731295), (5, 4292518), (10, 2146259), (19, 1129610), (37, 580070), (38, 564805), (43, 499130), (71, 302290), (74, 290035), (86, 249565), (95, 225922), (142, 151145), (185, 116014), (190, 112961), (215, 99826), (355, 60458), (370, 58007), (430, 49913), (703, 30530), (710, 30229), (817, 26270), (1349, 15910), (1406, 15265), (1591, 13490), (1634, 13135), (2627, 8170), (2698, 7955), (3053, 7030), (3182, 6745), (3515, 6106), (4085, 5254)]