21766520

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{953}}^1$

素因数の和:1535

約数の個数: 32

約数和(自身を含む): 49111920

約数和(自身を除く): 27345400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 953, 1142, 1906, 2284, 2855, 3812, 4568, 4765, 5710, 7624, 9530, 11420, 19060, 22840, 38120, 544163, 1088326, 2176652, 2720815, 4353304, 5441630, 10883260, 21766520]

約数ペア:

[(1, 21766520), (2, 10883260), (4, 5441630), (5, 4353304), (8, 2720815), (10, 2176652), (20, 1088326), (40, 544163), (571, 38120), (953, 22840), (1142, 19060), (1906, 11420), (2284, 9530), (2855, 7624), (3812, 5710), (4568, 4765)]