20673615

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{251}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 37134720

約数和(自身を除く): 16461105

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 251, 255, 285, 289, 323, 753, 867, 969, 1255, 1445, 1615, 3765, 4267, 4335, 4769, 4845, 5491, 12801, 14307, 16473, 21335, 23845, 27455, 64005, 71535, 72539, 81073, 82365, 217617, 243219, 362695, 405365, 1088085, 1216095, 1378241, 4134723, 6891205, 20673615]

約数ペア:

[(1, 20673615), (3, 6891205), (5, 4134723), (15, 1378241), (17, 1216095), (19, 1088085), (51, 405365), (57, 362695), (85, 243219), (95, 217617), (251, 82365), (255, 81073), (285, 72539), (289, 71535), (323, 64005), (753, 27455), (867, 23845), (969, 21335), (1255, 16473), (1445, 14307), (1615, 12801), (3765, 5491), (4267, 4845), (4335, 4769)]