21721750

素因数分解:

$2^1\times 5^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{269}}^1$

素因数の和:322

約数の個数: 64

約数和(自身を含む): 45489600

約数和(自身を除く): 23767850

約数列:

[1, 2, 5, 10, 17, 19, 25, 34, 38, 50, 85, 95, 125, 170, 190, 250, 269, 323, 425, 475, 538, 646, 850, 950, 1345, 1615, 2125, 2375, 2690, 3230, 4250, 4573, 4750, 5111, 6725, 8075, 9146, 10222, 13450, 16150, 22865, 25555, 33625, 40375, 45730, 51110, 67250, 80750, 86887, 114325, 127775, 173774, 228650, 255550, 434435, 571625, 638875, 868870, 1143250, 1277750, 2172175, 4344350, 10860875, 21721750]

約数ペア:

[(1, 21721750), (2, 10860875), (5, 4344350), (10, 2172175), (17, 1277750), (19, 1143250), (25, 868870), (34, 638875), (38, 571625), (50, 434435), (85, 255550), (95, 228650), (125, 173774), (170, 127775), (190, 114325), (250, 86887), (269, 80750), (323, 67250), (425, 51110), (475, 45730), (538, 40375), (646, 33625), (850, 25555), (950, 22865), (1345, 16150), (1615, 13450), (2125, 10222), (2375, 9146), (2690, 8075), (3230, 6725), (4250, 5111), (4573, 4750)]