20978360

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40343}}^1$

素因数の和:40367

約数の個数: 32

約数和(自身を含む): 50833440

約数和(自身を除く): 29855080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40343, 80686, 161372, 201715, 322744, 403430, 524459, 806860, 1048918, 1613720, 2097836, 2622295, 4195672, 5244590, 10489180, 20978360]

約数ペア:

[(1, 20978360), (2, 10489180), (4, 5244590), (5, 4195672), (8, 2622295), (10, 2097836), (13, 1613720), (20, 1048918), (26, 806860), (40, 524459), (52, 403430), (65, 322744), (104, 201715), (130, 161372), (260, 80686), (520, 40343)]