19781755

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{197}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 9110405

約数列:

[1, 5, 7, 19, 35, 95, 133, 151, 197, 665, 755, 985, 1057, 1379, 2869, 3743, 5285, 6895, 14345, 18715, 20083, 26201, 29747, 100415, 131005, 148735, 208229, 565193, 1041145, 2825965, 3956351, 19781755]

約数ペア:

[(1, 19781755), (5, 3956351), (7, 2825965), (19, 1041145), (35, 565193), (95, 208229), (133, 148735), (151, 131005), (197, 100415), (665, 29747), (755, 26201), (985, 20083), (1057, 18715), (1379, 14345), (2869, 6895), (3743, 5285)]