647042530

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:491

約数の個数: 64

約数和(自身を含む): 1251360000

約数和(自身を除く): 604317470

約数列:

[1, 2, 5, 10, 19, 38, 95, 109, 157, 190, 199, 218, 314, 398, 545, 785, 995, 1090, 1570, 1990, 2071, 2983, 3781, 4142, 5966, 7562, 10355, 14915, 17113, 18905, 20710, 21691, 29830, 31243, 34226, 37810, 43382, 62486, 85565, 108455, 156215, 171130, 216910, 312430, 325147, 412129, 593617, 650294, 824258, 1187234, 1625735, 2060645, 2968085, 3251470, 3405487, 4121290, 5936170, 6810974, 17027435, 34054870, 64704253, 129408506, 323521265, 647042530]

約数ペア:

[(1, 647042530), (2, 323521265), (5, 129408506), (10, 64704253), (19, 34054870), (38, 17027435), (95, 6810974), (109, 5936170), (157, 4121290), (190, 3405487), (199, 3251470), (218, 2968085), (314, 2060645), (398, 1625735), (545, 1187234), (785, 824258), (995, 650294), (1090, 593617), (1570, 412129), (1990, 325147), (2071, 312430), (2983, 216910), (3781, 171130), (4142, 156215), (5966, 108455), (7562, 85565), (10355, 62486), (14915, 43382), (17113, 37810), (18905, 34226), (20710, 31243), (21691, 29830)]