205993820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{103}}^1\times {\mathrm{277}}^1$

素因数の和:427

約数の個数: 72

約数和(自身を含む): 462649824

約数和(自身を除く): 256656004

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 103, 190, 206, 277, 361, 380, 412, 515, 554, 722, 1030, 1108, 1385, 1444, 1805, 1957, 2060, 2770, 3610, 3914, 5263, 5540, 7220, 7828, 9785, 10526, 19570, 21052, 26315, 28531, 37183, 39140, 52630, 57062, 74366, 99997, 105260, 114124, 142655, 148732, 185915, 199994, 285310, 371830, 399988, 499985, 542089, 570620, 743660, 999970, 1084178, 1999940, 2168356, 2710445, 5420890, 10299691, 10841780, 20599382, 41198764, 51498455, 102996910, 205993820]

約数ペア:

[(1, 205993820), (2, 102996910), (4, 51498455), (5, 41198764), (10, 20599382), (19, 10841780), (20, 10299691), (38, 5420890), (76, 2710445), (95, 2168356), (103, 1999940), (190, 1084178), (206, 999970), (277, 743660), (361, 570620), (380, 542089), (412, 499985), (515, 399988), (554, 371830), (722, 285310), (1030, 199994), (1108, 185915), (1385, 148732), (1444, 142655), (1805, 114124), (1957, 105260), (2060, 99997), (2770, 74366), (3610, 57062), (3914, 52630), (5263, 39140), (5540, 37183), (7220, 28531), (7828, 26315), (9785, 21052), (10526, 19570)]