21000724768

素因数分解:

$2^5\times {\mathrm{101}}^1\times {\mathrm{2381}}^1\times {\mathrm{2729}}^1$

素因数の和:5221

約数の個数: 48

約数和(自身を含む): 41787378360

約数和(自身を除く): 20786653592

約数列:

[1, 2, 4, 8, 16, 32, 101, 202, 404, 808, 1616, 2381, 2729, 3232, 4762, 5458, 9524, 10916, 19048, 21832, 38096, 43664, 76192, 87328, 240481, 275629, 480962, 551258, 961924, 1102516, 1923848, 2205032, 3847696, 4410064, 6497749, 7695392, 8820128, 12995498, 25990996, 51981992, 103963984, 207927968, 656272649, 1312545298, 2625090596, 5250181192, 10500362384, 21000724768]

約数ペア:

[(1, 21000724768), (2, 10500362384), (4, 5250181192), (8, 2625090596), (16, 1312545298), (32, 656272649), (101, 207927968), (202, 103963984), (404, 51981992), (808, 25990996), (1616, 12995498), (2381, 8820128), (2729, 7695392), (3232, 6497749), (4762, 4410064), (5458, 3847696), (9524, 2205032), (10916, 1923848), (19048, 1102516), (21832, 961924), (38096, 551258), (43664, 480962), (76192, 275629), (87328, 240481)]