19980645

素因数分解:

$3^1\times 5^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 32970240

約数和(自身を除く): 12989595

約数列:

[1, 3, 5, 15, 59, 107, 177, 211, 295, 321, 535, 633, 885, 1055, 1605, 3165, 6313, 12449, 18939, 22577, 31565, 37347, 62245, 67731, 94695, 112885, 186735, 338655, 1332043, 3996129, 6660215, 19980645]

約数ペア:

[(1, 19980645), (3, 6660215), (5, 3996129), (15, 1332043), (59, 338655), (107, 186735), (177, 112885), (211, 94695), (295, 67731), (321, 62245), (535, 37347), (633, 31565), (885, 22577), (1055, 18939), (1605, 12449), (3165, 6313)]