20721680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37003}}^1$

素因数の和:37023

約数の個数: 40

約数和(自身を含む): 55061952

約数和(自身を除く): 34340272

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37003, 74006, 148012, 185015, 259021, 296024, 370030, 518042, 592048, 740060, 1036084, 1295105, 1480120, 2072168, 2590210, 2960240, 4144336, 5180420, 10360840, 20721680]

約数ペア:

[(1, 20721680), (2, 10360840), (4, 5180420), (5, 4144336), (7, 2960240), (8, 2590210), (10, 2072168), (14, 1480120), (16, 1295105), (20, 1036084), (28, 740060), (35, 592048), (40, 518042), (56, 370030), (70, 296024), (80, 259021), (112, 185015), (140, 148012), (280, 74006), (560, 37003)]