256144720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{1511}}^1$

素因数の和:1700

約数の個数: 80

約数和(自身を含む): 645708672

約数和(自身を除く): 389563952

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 163, 208, 260, 326, 520, 652, 815, 1040, 1304, 1511, 1630, 2119, 2608, 3022, 3260, 4238, 6044, 6520, 7555, 8476, 10595, 12088, 13040, 15110, 16952, 19643, 21190, 24176, 30220, 33904, 39286, 42380, 60440, 78572, 84760, 98215, 120880, 157144, 169520, 196430, 246293, 314288, 392860, 492586, 785720, 985172, 1231465, 1571440, 1970344, 2462930, 3201809, 3940688, 4925860, 6403618, 9851720, 12807236, 16009045, 19703440, 25614472, 32018090, 51228944, 64036180, 128072360, 256144720]

約数ペア:

[(1, 256144720), (2, 128072360), (4, 64036180), (5, 51228944), (8, 32018090), (10, 25614472), (13, 19703440), (16, 16009045), (20, 12807236), (26, 9851720), (40, 6403618), (52, 4925860), (65, 3940688), (80, 3201809), (104, 2462930), (130, 1970344), (163, 1571440), (208, 1231465), (260, 985172), (326, 785720), (520, 492586), (652, 392860), (815, 314288), (1040, 246293), (1304, 196430), (1511, 169520), (1630, 157144), (2119, 120880), (2608, 98215), (3022, 84760), (3260, 78572), (4238, 60440), (6044, 42380), (6520, 39286), (7555, 33904), (8476, 30220), (10595, 24176), (12088, 21190), (13040, 19643), (15110, 16952)]