201721720

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{39709}}^1$

素因数の和:39847

約数の個数: 32

約数和(自身を含む): 457459200

約数和(自身を除く): 255737480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 5080, 39709, 79418, 158836, 198545, 317672, 397090, 794180, 1588360, 5043043, 10086086, 20172172, 25215215, 40344344, 50430430, 100860860, 201721720]

約数ペア:

[(1, 201721720), (2, 100860860), (4, 50430430), (5, 40344344), (8, 25215215), (10, 20172172), (20, 10086086), (40, 5043043), (127, 1588360), (254, 794180), (508, 397090), (635, 317672), (1016, 198545), (1270, 158836), (2540, 79418), (5080, 39709)]