20345780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1597}}^1$

素因数の和:1633

約数の個数: 72

約数和(自身を含む): 53558568

約数和(自身を除く): 33212788

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1597, 1820, 2548, 3185, 3194, 6370, 6388, 7985, 11179, 12740, 15970, 20761, 22358, 31940, 41522, 44716, 55895, 78253, 83044, 103805, 111790, 145327, 156506, 207610, 223580, 290654, 313012, 391265, 415220, 581308, 726635, 782530, 1017289, 1453270, 1565060, 2034578, 2906540, 4069156, 5086445, 10172890, 20345780]

約数ペア:

[(1, 20345780), (2, 10172890), (4, 5086445), (5, 4069156), (7, 2906540), (10, 2034578), (13, 1565060), (14, 1453270), (20, 1017289), (26, 782530), (28, 726635), (35, 581308), (49, 415220), (52, 391265), (65, 313012), (70, 290654), (91, 223580), (98, 207610), (130, 156506), (140, 145327), (182, 111790), (196, 103805), (245, 83044), (260, 78253), (364, 55895), (455, 44716), (490, 41522), (637, 31940), (910, 22358), (980, 20761), (1274, 15970), (1597, 12740), (1820, 11179), (2548, 7985), (3185, 6388), (3194, 6370)]