21911960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{563}}^1$

素因数の和:720

約数の個数: 64

約数和(自身を含む): 56851200

約数和(自身を除く): 34939240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 556, 563, 695, 973, 1112, 1126, 1390, 1946, 2252, 2780, 2815, 3892, 3941, 4504, 4865, 5560, 5630, 7784, 7882, 9730, 11260, 15764, 19460, 19705, 22520, 31528, 38920, 39410, 78257, 78820, 156514, 157640, 313028, 391285, 547799, 626056, 782570, 1095598, 1565140, 2191196, 2738995, 3130280, 4382392, 5477990, 10955980, 21911960]

約数ペア:

[(1, 21911960), (2, 10955980), (4, 5477990), (5, 4382392), (7, 3130280), (8, 2738995), (10, 2191196), (14, 1565140), (20, 1095598), (28, 782570), (35, 626056), (40, 547799), (56, 391285), (70, 313028), (139, 157640), (140, 156514), (278, 78820), (280, 78257), (556, 39410), (563, 38920), (695, 31528), (973, 22520), (1112, 19705), (1126, 19460), (1390, 15764), (1946, 11260), (2252, 9730), (2780, 7882), (2815, 7784), (3892, 5630), (3941, 5560), (4504, 4865)]