217040420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{1307}}^1$

素因数の和:1377

約数の個数: 72

約数和(自身を含む): 502334784

約数和(自身を除く): 285294364

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 361, 380, 437, 460, 722, 874, 1307, 1444, 1748, 1805, 2185, 2614, 3610, 4370, 5228, 6535, 7220, 8303, 8740, 13070, 16606, 24833, 26140, 30061, 33212, 41515, 49666, 60122, 83030, 99332, 120244, 124165, 150305, 166060, 248330, 300610, 471827, 496660, 571159, 601220, 943654, 1142318, 1887308, 2284636, 2359135, 2855795, 4718270, 5711590, 9436540, 10852021, 11423180, 21704042, 43408084, 54260105, 108520210, 217040420]

約数ペア:

[(1, 217040420), (2, 108520210), (4, 54260105), (5, 43408084), (10, 21704042), (19, 11423180), (20, 10852021), (23, 9436540), (38, 5711590), (46, 4718270), (76, 2855795), (92, 2359135), (95, 2284636), (115, 1887308), (190, 1142318), (230, 943654), (361, 601220), (380, 571159), (437, 496660), (460, 471827), (722, 300610), (874, 248330), (1307, 166060), (1444, 150305), (1748, 124165), (1805, 120244), (2185, 99332), (2614, 83030), (3610, 60122), (4370, 49666), (5228, 41515), (6535, 33212), (7220, 30061), (8303, 26140), (8740, 24833), (13070, 16606)]