21000655195

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1\times {\mathrm{683}}^1$

素因数の和:1012

約数の個数: 64

約数和(自身を含む): 28759256064

約数和(自身を除く): 7758600869

約数列:

[1, 5, 13, 23, 65, 115, 131, 157, 299, 655, 683, 785, 1495, 1703, 2041, 3013, 3415, 3611, 8515, 8879, 10205, 15065, 15709, 18055, 20567, 39169, 44395, 46943, 78545, 89473, 102835, 107231, 195845, 204217, 234715, 267371, 447365, 473041, 536155, 1021085, 1163149, 1336855, 1394003, 2057879, 2365205, 2466313, 5815745, 6149533, 6970015, 10289395, 12331565, 14047261, 26752427, 30747665, 32062069, 70236305, 133762135, 160310345, 182614393, 323087003, 913071965, 1615435015, 4200131039, 21000655195]

約数ペア:

[(1, 21000655195), (5, 4200131039), (13, 1615435015), (23, 913071965), (65, 323087003), (115, 182614393), (131, 160310345), (157, 133762135), (299, 70236305), (655, 32062069), (683, 30747665), (785, 26752427), (1495, 14047261), (1703, 12331565), (2041, 10289395), (3013, 6970015), (3415, 6149533), (3611, 5815745), (8515, 2466313), (8879, 2365205), (10205, 2057879), (15065, 1394003), (15709, 1336855), (18055, 1163149), (20567, 1021085), (39169, 536155), (44395, 473041), (46943, 447365), (78545, 267371), (89473, 234715), (102835, 204217), (107231, 195845)]