20681990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{359}}^1\times {\mathrm{823}}^1$

素因数の和:1196

約数の個数: 32

約数和(自身を含む): 42716160

約数和(自身を除く): 22034170

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 359, 718, 823, 1646, 1795, 2513, 3590, 4115, 5026, 5761, 8230, 11522, 12565, 25130, 28805, 57610, 295457, 590914, 1477285, 2068199, 2954570, 4136398, 10340995, 20681990]

約数ペア:

[(1, 20681990), (2, 10340995), (5, 4136398), (7, 2954570), (10, 2068199), (14, 1477285), (35, 590914), (70, 295457), (359, 57610), (718, 28805), (823, 25130), (1646, 12565), (1795, 11522), (2513, 8230), (3590, 5761), (4115, 5026)]