19887945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{257}}^1$

素因数の和:350

約数の個数: 64

約数和(自身を含む): 40421376

約数和(自身を除く): 20533431

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 67, 77, 105, 165, 201, 231, 257, 335, 385, 469, 737, 771, 1005, 1155, 1285, 1407, 1799, 2211, 2345, 2827, 3685, 3855, 5159, 5397, 7035, 8481, 8995, 11055, 14135, 15477, 17219, 19789, 25795, 26985, 42405, 51657, 59367, 77385, 86095, 98945, 120533, 189409, 258285, 296835, 361599, 568227, 602665, 947045, 1325863, 1807995, 2841135, 3977589, 6629315, 19887945]

約数ペア:

[(1, 19887945), (3, 6629315), (5, 3977589), (7, 2841135), (11, 1807995), (15, 1325863), (21, 947045), (33, 602665), (35, 568227), (55, 361599), (67, 296835), (77, 258285), (105, 189409), (165, 120533), (201, 98945), (231, 86095), (257, 77385), (335, 59367), (385, 51657), (469, 42405), (737, 26985), (771, 25795), (1005, 19789), (1155, 17219), (1285, 15477), (1407, 14135), (1799, 11055), (2211, 8995), (2345, 8481), (2827, 7035), (3685, 5397), (3855, 5159)]