20667760

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3539}}^1$

素因数の和:3625

約数の個数: 40

約数和(自身を含む): 48724560

約数和(自身を除く): 28056800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3539, 5840, 7078, 14156, 17695, 28312, 35390, 56624, 70780, 141560, 258347, 283120, 516694, 1033388, 1291735, 2066776, 2583470, 4133552, 5166940, 10333880, 20667760]

約数ペア:

[(1, 20667760), (2, 10333880), (4, 5166940), (5, 4133552), (8, 2583470), (10, 2066776), (16, 1291735), (20, 1033388), (40, 516694), (73, 283120), (80, 258347), (146, 141560), (292, 70780), (365, 56624), (584, 35390), (730, 28312), (1168, 17695), (1460, 14156), (2920, 7078), (3539, 5840)]