289463320

素因数分解:

$2^3\times 5^1\times {\mathrm{1993}}^1\times {\mathrm{3631}}^1$

素因数の和:5635

約数の個数: 32

約数和(自身を含む): 651798720

約数和(自身を除く): 362335400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1993, 3631, 3986, 7262, 7972, 9965, 14524, 15944, 18155, 19930, 29048, 36310, 39860, 72620, 79720, 145240, 7236583, 14473166, 28946332, 36182915, 57892664, 72365830, 144731660, 289463320]

約数ペア:

[(1, 289463320), (2, 144731660), (4, 72365830), (5, 57892664), (8, 36182915), (10, 28946332), (20, 14473166), (40, 7236583), (1993, 145240), (3631, 79720), (3986, 72620), (7262, 39860), (7972, 36310), (9965, 29048), (14524, 19930), (15944, 18155)]