20401720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16453}}^1$

素因数の和:16495

約数の個数: 32

約数和(自身を含む): 47387520

約数和(自身を除く): 26985800

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16453, 32906, 65812, 82265, 131624, 164530, 329060, 510043, 658120, 1020086, 2040172, 2550215, 4080344, 5100430, 10200860, 20401720]

約数ペア:

[(1, 20401720), (2, 10200860), (4, 5100430), (5, 4080344), (8, 2550215), (10, 2040172), (20, 1020086), (31, 658120), (40, 510043), (62, 329060), (124, 164530), (155, 131624), (248, 82265), (310, 65812), (620, 32906), (1240, 16453)]