21400979042

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1\times {\mathrm{139}}^1\times {\mathrm{523}}^1$

素因数の和:871

約数の個数: 64

約数和(自身を含む): 34931097600

約数和(自身を除く): 13530118558

約数列:

[1, 2, 19, 38, 61, 122, 127, 139, 254, 278, 523, 1046, 1159, 2318, 2413, 2641, 4826, 5282, 7747, 8479, 9937, 15494, 16958, 17653, 19874, 31903, 35306, 63806, 66421, 72697, 132842, 145394, 147193, 161101, 294386, 322202, 335407, 606157, 670814, 1076833, 1212314, 1261999, 1381243, 2153666, 2523998, 2762486, 4051681, 4434517, 8103362, 8869034, 9232519, 18465038, 20459827, 40919654, 76981939, 84255823, 153963878, 168511646, 175417861, 350835722, 563183659, 1126367318, 10700489521, 21400979042]

約数ペア:

[(1, 21400979042), (2, 10700489521), (19, 1126367318), (38, 563183659), (61, 350835722), (122, 175417861), (127, 168511646), (139, 153963878), (254, 84255823), (278, 76981939), (523, 40919654), (1046, 20459827), (1159, 18465038), (2318, 9232519), (2413, 8869034), (2641, 8103362), (4826, 4434517), (5282, 4051681), (7747, 2762486), (8479, 2523998), (9937, 2153666), (15494, 1381243), (16958, 1261999), (17653, 1212314), (19874, 1076833), (31903, 670814), (35306, 606157), (63806, 335407), (66421, 322202), (72697, 294386), (132842, 161101), (145394, 147193)]