20051720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{38561}}^1$

素因数の和:38585

約数の個数: 32

約数和(自身を含む): 48588120

約数和(自身を除く): 28536400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 38561, 77122, 154244, 192805, 308488, 385610, 501293, 771220, 1002586, 1542440, 2005172, 2506465, 4010344, 5012930, 10025860, 20051720]

約数ペア:

[(1, 20051720), (2, 10025860), (4, 5012930), (5, 4010344), (8, 2506465), (10, 2005172), (13, 1542440), (20, 1002586), (26, 771220), (40, 501293), (52, 385610), (65, 308488), (104, 192805), (130, 154244), (260, 77122), (520, 38561)]